655
655 is an odd composite number composed of two prime numbers multiplied together.
655 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 655:
5^{} × 131^{}
See below for interesting mathematical facts about the number 655 from the Numbermatics database.
Names of 655
 Cardinal: 655 can be written as Six hundred fiftyfive.
Scientific notation
 Scientific notation: 6.55 × 10^{2}
Factors of 655
Divisors of 655
Bases of 655
 Binary: 1010001111_{2}
 Hexadecimal: 0x28F
 Base36: I7
Squares and roots of 655
Scales and comparisons
How big is 655? 655 seconds is equal to 10 minutes, 55 seconds.

To count from 1 to 655 would take you about five minutes.
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 randomlychosen 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 655 cubic inches would be around 0.7 feet tall.
Recreational maths with 655
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The information we have on file for 655 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!
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