256624766 has 16 divisors (see below), whose sum is σ = 387886704. Its totient is φ = 127332864.

The previous prime is 256624763. The next prime is 256624769. The reversal of 256624766 is 667426652.

It is an interprime number because it is at equal distance from previous prime (256624763) and next prime (256624769).

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256624763) 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, 282485 + ... + 283391.

It is an arithmetic number, because the mean of its divisors is an integer number (24242919).

Almost surely, 2^256624766 is an apocalyptic number.

256624766 is a deficient number, since it is larger than the sum of its proper divisors (131261938).

256624766 is a wasteful number, since it uses less digits than its factorization.

256624766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835.

The product of its digits is 725760, while the sum is 44.

The square root of 256624766 is about 16019.5120400092. The cubic root of 256624766 is about 635.4765398020.

The spelling of 256624766 in words is "two hundred fifty-six million, six hundred twenty-four thousand, seven hundred sixty-six".