256900166 has 16 divisors (see below), whose sum is σ = 390186720. Its totient is φ = 126844800.

The previous prime is 256900153. The next prime is 256900187. The reversal of 256900166 is 661009652.

It is a happy 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, 87230 + ... + 90126.

It is an arithmetic number, because the mean of its divisors is an integer number (24386670).

Almost surely, 2^256900166 is an apocalyptic number.

256900166 is a deficient number, since it is larger than the sum of its proper divisors (133286554).

256900166 is a wasteful number, since it uses less digits than its factorization.

256900166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3439.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 256900166 is about 16028.1055025227. The cubic root of 256900166 is about 635.7037816674.

The spelling of 256900166 in words is "two hundred fifty-six million, nine hundred thousand, one hundred sixty-six".