256079966 has 16 divisors (see below), whose sum is σ = 387180000. Its totient is φ = 127024128.

The previous prime is 256079951. The next prime is 256079977. The reversal of 256079966 is 669970652.

It is a super-2 number, since 2×256079966² = 131153897973122312, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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, 177986 + ... + 179418.

It is an arithmetic number, because the mean of its divisors is an integer number (24198750).

Almost surely, 2^256079966 is an apocalyptic number.

256079966 is a deficient number, since it is larger than the sum of its proper divisors (131100034).

256079966 is a wasteful number, since it uses less digits than its factorization.

256079966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2083.

The product of its (nonzero) digits is 1224720, while the sum is 50.

The square root of 256079966 is about 16002.4987423840. The cubic root of 256079966 is about 635.0265275048.

The spelling of 256079966 in words is "two hundred fifty-six million, seventy-nine thousand, nine hundred sixty-six".