256365166 has 32 divisors (see below), whose sum is σ = 401448960. Its totient is φ = 122709600.

The previous prime is 256365163. The next prime is 256365173. The reversal of 256365166 is 661563652.

It is a happy number.

Its product of digits (194400) is a multiple of the sum of its prime divisors (480).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256365163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1342131 + ... + 1342321.

It is an arithmetic number, because the mean of its divisors is an integer number (12545280).

Almost surely, 2^256365166 is an apocalyptic number.

256365166 is a deficient number, since it is larger than the sum of its proper divisors (145083794).

256365166 is a wasteful number, since it uses less digits than its factorization.

256365166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480.

The product of its digits is 194400, while the sum is 40.

The square root of 256365166 is about 16011.4073709965. The cubic root of 256365166 is about 635.2621861486.

The spelling of 256365166 in words is "two hundred fifty-six million, three hundred sixty-five thousand, one hundred sixty-six".