65991

65,991 is an odd composite number composed of two prime numbers multiplied together.

What does the number 65991 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

65991 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

Prime factorization of 65991:

3 × 21997

See below for interesting mathematical facts about the number 65991 from the Numbermatics database.


Names of 65991

  • Cardinal: 65991 can be written as Sixty-five thousand, nine hundred ninety-one.

Scientific notation

  • Scientific notation: 6.5991 × 104

Factors of 65991

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 22000

Divisors of 65991

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 87992
  • Sum of proper divisors (its aliquot sum) s(n): 22001
  • 65991 is a deficient number, because the sum of its proper divisors (22001) is less than itself. Its deficiency is 43990

Bases of 65991

  • Binary: 100000001110001112
  • Hexadecimal: 0x101C7
  • Base-36: 1EX3

Squares and roots of 65991

  • 65991 squared (659912) is 4354812081
  • 65991 cubed (659913) is 287378404037271
  • The square root of 65991 is 256.8871347499
  • The cube root of 65991 is 40.4105631955

Scales and comparisons

How big is 65991?
  • 65,991 seconds is equal to 18 hours, 19 minutes, 51 seconds.
  • To count from 1 to 65,991 would take you about eighteen hours.

    This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

  • A cube with a volume of 65991 cubic inches would be around 3.4 feet tall.

Recreational maths with 65991

  • 65991 backwards is 19956
  • The number of decimal digits it has is: 5
  • The sum of 65991's digits is 30
  • More coming soon!

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"Number 65991 - Facts about the integer". Numbermatics.com. 2024. Web. 29 March 2024.

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Numbermatics. (2024). Number 65991 - Facts about the integer. Retrieved 29 March 2024, from https://numbermatics.com/n/65991/

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Numbermatics. 2024. "Number 65991 - Facts about the integer". https://numbermatics.com/n/65991/

The information we have on file for 65991 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

Keywords: Divisors of 65991, math, Factors of 65991, curriculum, school, college, exams, university, Prime factorization of 65991, STEM, science, technology, engineering, physics, economics, calculator, sixty-five thousand, nine hundred ninety-one.

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