656555 has 4 divisors (see below), whose sum is σ = 787872. Its totient is φ = 525240.

The previous prime is 656527. The next prime is 656561. The reversal of 656555 is 555656.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 656555 - 2¹⁰ = 655531 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65651 + ... + 65660.

It is an arithmetic number, because the mean of its divisors is an integer number (196968).

2⁶⁵⁶⁵⁵⁵ is an apocalyptic number.

656555 is a deficient number, since it is larger than the sum of its proper divisors (131317).

656555 is a wasteful number, since it uses less digits than its factorization.

656555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131316.

The product of its digits is 22500, while the sum is 32.

The square root of 656555 is about 810.2808155202. The cubic root of 656555 is about 86.9141267434.

The spelling of 656555 in words is "six hundred fifty-six thousand, five hundred fifty-five".