656976 has 20 divisors (see below), whose sum is σ = 1697312. Its totient is φ = 218976.

The previous prime is 656959. The next prime is 656977. The reversal of 656976 is 679656.

It is a happy number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 656976.

It is not an unprimeable number, because it can be changed into a prime (656977) by changing a digit.

656976 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6796 + ... + 6891.

2⁶⁵⁶⁹⁷⁶ is an apocalyptic number.

It is an amenable number.

656976 is an abundant number, since it is smaller than the sum of its proper divisors (1040336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

656976 is a wasteful number, since it uses less digits than its factorization.

656976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13698 (or 13692 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The square root of 656976 is about 810.5405603670. The cubic root of 656976 is about 86.9326999674.

It can be divided in two parts, 65697 and 6, that added together give a triangular number (65703 = T₃₆₂).

The spelling of 656976 in words is "six hundred fifty-six thousand, nine hundred seventy-six".