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# 66

Number 66 (sixty-six) is an even two-digits composite number and natural number following 65 and preceding 67.

## Properties of the number 66

 Nominal 66 Cardinal sixty-six Ordinal 66th Number of digits 2 Sum of digits 12 Product of digits 36 Number parity Even
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## Prime Factorization of 66

 Prime factorization 2 x 3 x 11 Prime factors 2, 3, 11 Number of distinct prime factors ω(n) 3 Total number of prime factors Ω(n) 3 Sum of prime factors 16 Product of prime factors 66
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## Divisors of 66

 List of proper divisors 1, 2, 3, 6, 11, 22, 33 List of all dividers 1, 2, 3, 6, 11, 22, 33, 66 Number of divisors d(n) 8 Sum of all divisors σ(n) 144 Aliquot sum 78 66 is an abundant number , because the sum of its proper divisors (78) is greater than itself. Its abundance is 12.
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## Prime numbers

 Is 66 a prime number? No Is 66 a semiprime number? No Is 66 a Chen prime number? No Is 66 a Mersenne prime number? No
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## Sequences

 Is 66 a Catalan number? No Is 66 a Fibonacci number? No Is 66 a Idoneal number? No
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## Number theory

Number theory is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions.
 66 is not a Happy number 66 is not a Humble number 66 is not a Münchhausen number 66 is not a Perfect number 66 is not a Perfect square 66 is a Palindrome
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## Numeric Bases of 66

In mathematics, a base or radix of a numeral system is the number of unique digits, including zero, used to represent numbers in that system.
BaseSystemValue
2Binary10000102
3Ternary21103
4Quaternary10024
5Quinary2315
6Senary1506
7Septenary1237
8Octal1028
9Nonary739
10Decimal66
12Duodecimal5612
16Hexadecimal4216
20Vigesimal3620
36Base361u36
60Sexagesimal1660
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## Mathematical operations

Mathematical operations are actions that are performed on numbers or mathematical expressions to find a numerical result.
 Square of 66 (n2) 4356 Cube of 66 (n3) 287496 Square root of 66 8.12404 Natural Logarithm (ln) of 66 4.18965 Decimal Logarithm (log) of 66 1.81954
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## Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
 Sine of 66 -0.0265512 Cosecant of 66 -37.6631 Cosine of 66 -0.999647 Secant of 66 -1.00035 Tangent of 66 0.0265605 Cotangent of 66 37.6499
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## Number parity

Parity is the property of an integer of whether it is even or odd.

### Is 66 an Even Number?

Yes, the number 66 is an even number.

### Is 66 an Odd Number?

No
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## Ban number

In recreational mathematics, a ban number is a number that does not contain a particular letter when spelled out in English; in other words, the letter is "banned".
 The spelling of 66 in words is "sixty-six", meaning that: 66 is an aban number (a number without the letter a) 66 is an eban number (a number without the letter e) 66 is not an iban number (as it contains the letter i) 66 is an oban number (a number without the letter o) 66 is not a tban number (as it contains the letter t) 66 is an uban number (a number without the letter u)
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## Numeral systems

How to write 66 in other number systems?
 Bengali numerals ৬৬ Eastern Arabic numerals ٦٦ Hieroglyphs numeralsused in Ancient Egypt 𓎋𓏿 Khmer numerals ៦៦ Japanese numerals 六十六 Roman numerals LXVI Thai numerals ๖๖
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## Translation

How do you say 66 in 38 different languages?
 Arabic ستة و ستون Croatian šezdeset i šest Czech šedesát šest Danish seks og tres Dutch zesenzestig Estonian blaade vɔ ade Faroese seksti­seks Filipino anim na pû’t anim Finnish kuusi­kymmentä­kuusi French soixante-six Greek εξήντα έξι German sechs­und­sechzig Hebrew שישים ושש Hindi छियासठ Hungarian hatvan­hat Icelandic sextíu og sex Indonesian enam puluh enam Italian sessantasei Japanese 六十六 Korean 육십육 Latvian sešdesmit seši Lithuanian šešiasdešimt šeši Norwegian seksti­seks Persian شصت و شش Polish sześćdziesiąt sześć Portuguese sessenta e seis Romanian şasezeci şi şase Russian шестьдесят шесть Serbian шездесет и шест Slovak šesťdesiat­šesť Slovene šestdeset šest Spanish sesenta y seis Swahili sitini na sita Swedish sextiosex Thai หก​สิบ​หก Turkish altmış altı Ukrainian шістдесят шість Vietnamese sáu mươi sáu
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## Miscellaneous

 Number 66 reversed 66 ASCII Code 66 B Unicode Character U+0042 B Unix Timestamp Thu, 01 Jan 1970 00:01:06 +0000
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