656877885 has 16 divisors (see below), whose sum is σ = 1059030720. Its totient is φ = 347659520.

The previous prime is 656877863. The next prime is 656877901. The reversal of 656877885 is 588778656.

It is not a de Polignac number, because 656877885 - 2⁶ = 656877821 is a prime.

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, 165180 + ... + 169109.

It is an arithmetic number, because the mean of its divisors is an integer number (66189420).

Almost surely, 2^656877885 is an apocalyptic number.

It is an amenable number.

656877885 is a deficient number, since it is larger than the sum of its proper divisors (402152835).

656877885 is a wasteful number, since it uses less digits than its factorization.

656877885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334428.

The product of its digits is 22579200, while the sum is 60.

The square root of 656877885 is about 25629.6290453061. The cubic root of 656877885 is about 869.2837214489.

The spelling of 656877885 in words is "six hundred fifty-six million, eight hundred seventy-seven thousand, eight hundred eighty-five".