656513966 has 32 divisors (see below), whose sum is σ = 1018180800. Its totient is φ = 317378304.

The previous prime is 656513947. The next prime is 656513987. The reversal of 656513966 is 669315656.

It is a self number, because there is not a number n which added to its sum of digits gives 656513966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2240516 + ... + 2240808.

It is an arithmetic number, because the mean of its divisors is an integer number (31818150).

Almost surely, 2^656513966 is an apocalyptic number.

656513966 is a deficient number, since it is larger than the sum of its proper divisors (361666834).

656513966 is a wasteful number, since it uses less digits than its factorization.

656513966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620.

The product of its digits is 874800, while the sum is 47.

The square root of 656513966 is about 25622.5284856901. The cubic root of 656513966 is about 869.1231602506.

The spelling of 656513966 in words is "six hundred fifty-six million, five hundred thirteen thousand, nine hundred sixty-six".