656657001 has 48 divisors (see below), whose sum is σ = 1273534080. Its totient is φ = 314876160.

The previous prime is 656656997. The next prime is 656657003. The reversal of 656657001 is 100756656.

It is a happy number.

656657001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 656657001 - 2² = 656656997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (656657003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27436 + ... + 45453.

It is an arithmetic number, because the mean of its divisors is an integer number (26531960).

Almost surely, 2^656657001 is an apocalyptic number.

It is an amenable number.

656657001 is a deficient number, since it is larger than the sum of its proper divisors (616877079).

656657001 is a wasteful number, since it uses less digits than its factorization.

656657001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72926 (or 72923 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 656657001 is about 25625.3195297151. The cubic root of 656657001 is about 869.1862744216.

The spelling of 656657001 in words is "six hundred fifty-six million, six hundred fifty-seven thousand, one".