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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

Nominal66
Cardinalsixty-six
Ordinal66th
Number of digits2
Sum of digits12
Product of digits36
Number parityEven
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Prime Factorization of 66

Prime factorization2 x 3 x 11
Prime factors2, 3, 11
Number of distinct prime factors ω(n)3
Total number of prime factors Ω(n)3
Sum of prime factors16
Product of prime factors66
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Divisors of 66

List of proper divisors 1, 2, 3, 6, 11, 22, 33
List of all dividers1, 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 668.124038404636
Natural Logarithm (ln) of 664.1896547420264
Decimal Logarithm (log) of 661.8195439355419
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Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
Sine of 66-0.026551154023967
Cosecant of 66-37.663146358811
Cosine of 66-0.99964745596635
Secant of 66-1.0003526683648
Tangent of 660.026560517776039
Cotangent of 6637.649868441274
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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 numerals৬৬
Eastern Arabic numerals٦٦
Hieroglyphs numeralsused in Ancient Egypt𓎋𓏿
Khmer numerals៦៦
Japanese numerals六十六
Roman numeralsLXVI
Thai numerals๖๖
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Translation

How do you say 66 in 38 different languages?
Arabicستة و ستون
Croatianšezdeset i šest
Czechšedesát šest
Danish seks og tres
Dutchzesenzestig
Estonianblaade vɔ ade
Faroeseseksti­seks
Filipinoanim na pû’t anim
Finnishkuusi­kymmentä­kuusi
Frenchsoixante-six
Greekεξήντα έξι
Germansechs­und­sechzig
Hebrewשישים ושש
Hindiछियासठ
Hungarianhatvan­hat
Icelandicsextíu og sex
Indonesianenam puluh enam
Italiansessantasei
Japanese六十六
Korean육십육
Latviansešdesmit seši
Lithuanianšešiasdešimt šeši
Norwegianseksti­seks
Persianشصت و شش
Polishsześćdziesiąt sześć
Portuguesesessenta e seis
Romanianşasezeci şi şase
Russianшестьдесят шесть
Serbianшездесет и шест
Slovakšesťdesiat­šesť
Slovenešestdeset šest
Spanish sesenta y seis
Swahilisitini na sita
Swedishsextiosex
Thaiหก​สิบ​หก
Turkishaltmış altı
Ukrainianшістдесят шість
Vietnamesesáu mươi sáu
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Miscellaneous

Number 66 reversed66
ASCII Code66B
Unicode CharacterU+0042B
Unix TimestampThu, 01 Jan 1970 00:01:06 +0000
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