256697067 has 32 divisors (see below), whose sum is σ = 387866880. Its totient is φ = 149582720.

The previous prime is 256697039. The next prime is 256697069. The reversal of 256697067 is 760796652.

It is a cyclic number.

It is not a de Polignac number, because 256697067 - 2⁶ = 256697003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256697069) 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 31 ways as a sum of consecutive naturals, for example, 331693 + ... + 332465.

It is an arithmetic number, because the mean of its divisors is an integer number (12120840).

Almost surely, 2^256697067 is an apocalyptic number.

256697067 is a deficient number, since it is larger than the sum of its proper divisors (131169813).

256697067 is a wasteful number, since it uses less digits than its factorization.

256697067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163.

The product of its (nonzero) digits is 952560, while the sum is 48.

The square root of 256697067 is about 16021.7685353397. The cubic root of 256697067 is about 635.5362135373.

The spelling of 256697067 in words is "two hundred fifty-six million, six hundred ninety-seven thousand, sixty-seven".