664774010256 has 40 divisors (see below), whose sum is σ = 1717488716544. Its totient is φ = 221571226240.

The previous prime is 664774010237. The next prime is 664774010261. The reversal of 664774010256 is 652010477466.

664774010256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 89280 + ... + 1156511.

Almost surely, 2^664774010256 is an apocalyptic number.

It is an amenable number.

664774010256 is an abundant number, since it is smaller than the sum of its proper divisors (1052714706288).

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

664774010256 is a wasteful number, since it uses less digits than its factorization.

664774010256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256919 (or 1256913 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 48.

The spelling of 664774010256 in words is "six hundred sixty-four billion, seven hundred seventy-four million, ten thousand, two hundred fifty-six".