256660959 has 8 divisors (see below), whose sum is σ = 346060080. Its totient is φ = 169184576.

The previous prime is 256660889. The next prime is 256660969. The reversal of 256660959 is 959066652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256660959 - 2¹² = 256656863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256660969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480372 + ... + 480905.

It is an arithmetic number, because the mean of its divisors is an integer number (43257510).

Almost surely, 2^256660959 is an apocalyptic number.

256660959 is a deficient number, since it is larger than the sum of its proper divisors (89399121).

256660959 is an equidigital number, since it uses as much as digits as its factorization.

256660959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961369.

The product of its (nonzero) digits is 874800, while the sum is 48.

The square root of 256660959 is about 16020.6416538165. The cubic root of 256660959 is about 635.5064131479.

The spelling of 256660959 in words is "two hundred fifty-six million, six hundred sixty thousand, nine hundred fifty-nine".