656878168 has 16 divisors (see below), whose sum is σ = 1264934880. Its totient is φ = 319562208.

The previous prime is 656878139. The next prime is 656878169. The reversal of 656878168 is 861878656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656878169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1109296 + ... + 1109887.

It is an arithmetic number, because the mean of its divisors is an integer number (79058430).

Almost surely, 2^656878168 is an apocalyptic number.

It is an amenable number.

656878168 is a deficient number, since it is larger than the sum of its proper divisors (608056712).

656878168 is a wasteful number, since it uses less digits than its factorization.

656878168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219226 (or 2219222 counting only the distinct ones).

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

The square root of 656878168 is about 25629.6345662594. The cubic root of 656878168 is about 869.2838462855.

The spelling of 656878168 in words is "six hundred fifty-six million, eight hundred seventy-eight thousand, one hundred sixty-eight".