256665452 has 24 divisors (see below), whose sum is σ = 483806400. Its totient is φ = 118749456.

The previous prime is 256665427. The next prime is 256665467. The reversal of 256665452 is 254566652.

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, 36002 + ... + 42537.

It is an arithmetic number, because the mean of its divisors is an integer number (20158600).

Almost surely, 2^256665452 is an apocalyptic number.

It is an amenable number.

256665452 is a deficient number, since it is larger than the sum of its proper divisors (227140948).

256665452 is a wasteful number, since it uses less digits than its factorization.

256665452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78605 (or 78603 counting only the distinct ones).

The product of its digits is 432000, while the sum is 41.

The square root of 256665452 is about 16020.7818785476. The cubic root of 256665452 is about 635.5101214300.

The spelling of 256665452 in words is "two hundred fifty-six million, six hundred sixty-five thousand, four hundred fifty-two".