656555656 has 16 divisors (see below), whose sum is σ = 1232395200. Its totient is φ = 327916944.

The previous prime is 656555633. The next prime is 656555663.

656555656 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37300 + ... + 52003.

It is an arithmetic number, because the mean of its divisors is an integer number (77024700).

Almost surely, 2^656555656 is an apocalyptic number.

It is an amenable number.

656555656 is a deficient number, since it is larger than the sum of its proper divisors (575839544).

656555656 is a wasteful number, since it uses less digits than its factorization.

656555656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90228 (or 90224 counting only the distinct ones).

The product of its digits is 4050000, while the sum is 49.

The square root of 656555656 is about 25623.3420146553. The cubic root of 656555656 is about 869.1415569030.

The spelling of 656555656 in words is "six hundred fifty-six million, five hundred fifty-five thousand, six hundred fifty-six".