256602660 has 48 divisors (see below), whose sum is σ = 724864896. Its totient is φ = 67820032.

The previous prime is 256602637. The next prime is 256602673. The reversal of 256602660 is 66206652.

256602660 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 15 ways as a sum of consecutive naturals, for example, 12144 + ... + 25703.

It is an arithmetic number, because the mean of its divisors is an integer number (15101352).

Almost surely, 2^256602660 is an apocalyptic number.

256602660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256602660 is an abundant number, since it is smaller than the sum of its proper divisors (468262236).

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

256602660 is a wasteful number, since it uses less digits than its factorization.

256602660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37972 (or 37970 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 256602660 is about 16018.8220540713. The cubic root of 256602660 is about 635.4582923455.

The spelling of 256602660 in words is "two hundred fifty-six million, six hundred two thousand, six hundred sixty".