656878816 has 48 divisors (see below), whose sum is σ = 1413136368. Its totient is φ = 298086400.

The previous prime is 656878777. The next prime is 656878819. The reversal of 656878816 is 618878656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656878819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287856 + ... + 290128.

It is an arithmetic number, because the mean of its divisors is an integer number (29440341).

Almost surely, 2^656878816 is an apocalyptic number.

It is an amenable number.

656878816 is an abundant number, since it is smaller than the sum of its proper divisors (756257552).

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

656878816 is a wasteful number, since it uses less digits than its factorization.

656878816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3115 (or 3107 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 55.

The square root of 656878816 is about 25629.6472078724. The cubic root of 656878816 is about 869.2841321304.

The spelling of 656878816 in words is "six hundred fifty-six million, eight hundred seventy-eight thousand, eight hundred sixteen".