256456166 has 8 divisors (see below), whose sum is σ = 388650360. Its totient is φ = 126906048.

The previous prime is 256456153. The next prime is 256456177. The reversal of 256456166 is 661654652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660776 + ... + 661163.

It is an arithmetic number, because the mean of its divisors is an integer number (48581295).

Almost surely, 2^256456166 is an apocalyptic number.

256456166 is a deficient number, since it is larger than the sum of its proper divisors (132194194).

256456166 is a wasteful number, since it uses less digits than its factorization.

256456166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322038.

The product of its digits is 259200, while the sum is 41.

The square root of 256456166 is about 16014.2488428274. The cubic root of 256456166 is about 635.3373419913.

The spelling of 256456166 in words is "two hundred fifty-six million, four hundred fifty-six thousand, one hundred sixty-six".