256610667 has 16 divisors (see below), whose sum is σ = 344736000. Its totient is φ = 169785504.

The previous prime is 256610659. The next prime is 256610681. The reversal of 256610667 is 766016652.

It is not a de Polignac number, because 256610667 - 2³ = 256610659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256610617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305434 + ... + 306272.

It is an arithmetic number, because the mean of its divisors is an integer number (21546000).

Almost surely, 2^256610667 is an apocalyptic number.

256610667 is a deficient number, since it is larger than the sum of its proper divisors (88125333).

256610667 is a wasteful number, since it uses less digits than its factorization.

256610667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490.

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

The square root of 256610667 is about 16019.0719768656. The cubic root of 256610667 is about 635.4649018660.

The spelling of 256610667 in words is "two hundred fifty-six million, six hundred ten thousand, six hundred sixty-seven".