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Number 65 (sixty-five) is an odd two-digits composite number and natural number following 64 and preceding 66.

Properties of the number 65

Number of digits2
Sum of digits11
Product of digits30
Number parityOdd
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Prime Factorization of 65

Prime factorization5 x 13
Prime factors5, 13
Number of distinct prime factors ω(n)2
Total number of prime factors Ω(n)2
Sum of prime factors18
Product of prime factors65
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Divisors of 65

List of proper divisors 1, 5, 13
List of all dividers1, 5, 13, 65
Number of divisors d(n)4
Sum of all divisors σ(n)84
Aliquot sum 19
65 is a deficient number , since it is larger than the sum of its proper divisors (19). Its deficiency is 46.
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Prime numbers

Is 65 a prime number?No
Is 65 a semiprime number?Yes
Is 65 a Chen prime number?No
Is 65 a Mersenne prime number?No
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Is 65 a Catalan number?No
Is 65 a Fibonacci number?No
Is 65 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.
65 is not a Happy number
65 is not a Humble number
65 is not a Münchhausen number
65 is not a Perfect number
65 is not a Perfect square
65 is not a Palindrome
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Numeric Bases of 65

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.
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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 65 (n2)4225
Cube of 65 (n3)274625
Square root of 658.0622577482985
Natural Logarithm (ln) of 654.1743872698956
Decimal Logarithm (log) of 651.8129133566429
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Trigonometry is the study of the relationship between the angles and sides of a triangle.
Sine of 650.8268286794901
Cosecant of 651.2094403892916
Cosine of 65-0.56245385123817
Secant of 65-1.7779236426217
Tangent of 65-1.4700382576632
Cotangent of 65-0.68025440480007
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Number parity

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

Is 65 an Even Number?


Is 65 an Odd Number?

Yes, the number 65 is an odd number.
Total number of all odd numbers from 1 to 65 is 33
Sum of all the odd numbers from 1 to 65 are 1089
The sum of all odd numbers is a perfect square: 1089 = 33
An odd number is any integer (a whole number) that cannot be divided by 2 evenly. Odd numbers are the opposite of even numbers.
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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 65 in words is "sixty-five", meaning that:
65 is an aban number (a number without the letter a)
65 is not an eban number (as it contains the letter e)
65 is not an iban number (as it contains the letter i)
65 is an oban number (a number without the letter o)
65 is not a tban number (as it contains the letter t)
65 is an uban number (a number without the letter u)
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Numeral systems

How to write 65 in other number systems?
Bengali numerals৬৫
Eastern Arabic numerals٦٥
Hieroglyphs numeralsused in Ancient Egypt𓎋𓏾
Khmer numerals៦៥
Japanese numerals六十五
Roman numeralsLXV
Thai numerals๖๕
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How do you say 65 in 38 different languages?
Arabicخمسة و ستون
Croatianšezdeset i pet
Czechšedesát pět
Danish fem og tres
Estonianblaade vɔ atɔ̃
Filipinoanim na pû’t limá
Greekεξήντα πέντε
Hebrewשישים וחמש
Icelandicsextíu og fimm
Indonesianenam puluh lima
Latviansešdesmit pieci
Lithuanianšešiasdešimt penki
Persianشصت و پنج
Polishsześćdziesiąt pięć
Portuguesesessenta e cinco
Romanianşasezeci şi cinci
Russianшестьдесят пять
Serbianшездесет и пет
Slovenešestdeset pet
Spanish sesenta y cinco
Swahilisitini na tano
Turkishaltmış beş
Ukrainianшістдесят пʼять
Vietnamesesáu mươi lăm
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Number 65 reversed56
Unicode CharacterU+0041A
Unix TimestampThu, 01 Jan 1970 00:01:05 +0000
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