256672766 has 32 divisors (see below), whose sum is σ = 466871040. Its totient is φ = 103314816.

The previous prime is 256672763. The next prime is 256672771. The reversal of 256672766 is 667276652.

It is a self number, because there is not a number n which added to its sum of digits gives 256672766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256672763) 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, 161765 + ... + 163343.

It is an arithmetic number, because the mean of its divisors is an integer number (14589720).

Almost surely, 2^256672766 is an apocalyptic number.

256672766 is a deficient number, since it is larger than the sum of its proper divisors (210198274).

256672766 is a wasteful number, since it uses less digits than its factorization.

256672766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288.

The product of its digits is 1270080, while the sum is 47.

The square root of 256672766 is about 16021.0101429342. The cubic root of 256672766 is about 635.5161579220.

The spelling of 256672766 in words is "two hundred fifty-six million, six hundred seventy-two thousand, seven hundred sixty-six".