257332665 has 16 divisors (see below), whose sum is σ = 417374208. Its totient is φ = 135363456.

The previous prime is 257332651. The next prime is 257332697. The reversal of 257332665 is 566233752.

It is not a de Polignac number, because 257332665 - 2⁵ = 257332633 is a prime.

It is an unprimeable number.

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, 116409 + ... + 118598.

It is an arithmetic number, because the mean of its divisors is an integer number (26085888).

Almost surely, 2^257332665 is an apocalyptic number.

It is an amenable number.

257332665 is a deficient number, since it is larger than the sum of its proper divisors (160041543).

257332665 is a wasteful number, since it uses less digits than its factorization.

257332665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235088.

The product of its digits is 226800, while the sum is 39.

The square root of 257332665 is about 16041.5917227687. The cubic root of 257332665 is about 636.0603236758.

The spelling of 257332665 in words is "two hundred fifty-seven million, three hundred thirty-two thousand, six hundred sixty-five".