256610660 has 24 divisors (see below), whose sum is σ = 543001536. Its totient is φ = 101859680.

The previous prime is 256610659. The next prime is 256610681. The reversal of 256610660 is 66016652.

256610660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46352 + ... + 51591.

It is an arithmetic number, because the mean of its divisors is an integer number (22625064).

Almost surely, 2^256610660 is an apocalyptic number.

256610660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256610660 is an abundant number, since it is smaller than the sum of its proper divisors (286390876).

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

256610660 is a wasteful number, since it uses less digits than its factorization.

256610660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98083 (or 98081 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 256610660 is about 16019.0717583760. The cubic root of 256610660 is about 635.4648960878.

The spelling of 256610660 in words is "two hundred fifty-six million, six hundred ten thousand, six hundred sixty".