# Is 6655 a prime number?

It is possible to find out using mathematical methods whether a given integer is a prime number or not.

No, 6 655 is not a prime number.

For example, 6 655 can be divided by 5: 6 655 / 5 = 1 331.

Actually, one can immediately see that 6 655 cannot be prime, because 5 is one of its divisors: indeed, a number ending with 0 or 5 has necessarily 5 among its divisors.
The last digit of 6 655 is 5, so it is divisible by 5 and is therefore *not* prime.

For 6 655 to be a prime number, it would have been required that 6 655 has only two divisors, i.e., itself and 1.

Find out more: