256607166 has 16 divisors (see below), whose sum is σ = 521913600. Its totient is φ = 84085848.

The previous prime is 256607161. The next prime is 256607171. The reversal of 256607166 is 661706652.

It is an interprime number because it is at equal distance from previous prime (256607161) and next prime (256607171).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256607161) 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 7 ways as a sum of consecutive naturals, for example, 362086 + ... + 362793.

It is an arithmetic number, because the mean of its divisors is an integer number (32619600).

Almost surely, 2^256607166 is an apocalyptic number.

256607166 is an abundant number, since it is smaller than the sum of its proper divisors (265306434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256607166 is a wasteful number, since it uses less digits than its factorization.

256607166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724943.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 256607166 is about 16018.9627004997. The cubic root of 256607166 is about 635.4620119202.

The spelling of 256607166 in words is "two hundred fifty-six million, six hundred seven thousand, one hundred sixty-six".