256668708 has 12 divisors (see below), whose sum is σ = 598893680. Its totient is φ = 85556232.

The previous prime is 256668697. The next prime is 256668719. The reversal of 256668708 is 807866652.

It is an interprime number because it is at equal distance from previous prime (256668697) and next prime (256668719).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10694518 + ... + 10694541.

Almost surely, 2^256668708 is an apocalyptic number.

It is an amenable number.

256668708 is an abundant number, since it is smaller than the sum of its proper divisors (342224972).

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

256668708 is a wasteful number, since it uses less digits than its factorization.

256668708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21389066 (or 21389064 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The square root of 256668708 is about 16020.8834962370. The cubic root of 256668708 is about 635.5128087312.

The spelling of 256668708 in words is "two hundred fifty-six million, six hundred sixty-eight thousand, seven hundred eight".