256668374 has 16 divisors (see below), whose sum is σ = 387800160. Its totient is φ = 127405440.

The previous prime is 256668367. The next prime is 256668383. The reversal of 256668374 is 473866652.

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, 210992 + ... + 212204.

It is an arithmetic number, because the mean of its divisors is an integer number (24237510).

Almost surely, 2^256668374 is an apocalyptic number.

256668374 is a deficient number, since it is larger than the sum of its proper divisors (131131786).

256668374 is a wasteful number, since it uses less digits than its factorization.

256668374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895.

The product of its digits is 1451520, while the sum is 47.

The square root of 256668374 is about 16020.8730723391. The cubic root of 256668374 is about 635.5125330693.

The spelling of 256668374 in words is "two hundred fifty-six million, six hundred sixty-eight thousand, three hundred seventy-four".