665256315 has 16 divisors (see below), whose sum is σ = 1065639456. Its totient is φ = 354393600.

The previous prime is 665256289. The next prime is 665256323. The reversal of 665256315 is 513652566.

It is not a de Polignac number, because 665256315 - 2¹¹ = 665254267 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11956 + ... + 38385.

It is an arithmetic number, because the mean of its divisors is an integer number (66602466).

Almost surely, 2^665256315 is an apocalyptic number.

665256315 is a deficient number, since it is larger than the sum of its proper divisors (400383141).

665256315 is a wasteful number, since it uses less digits than its factorization.

665256315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51230.

The product of its digits is 162000, while the sum is 39.

The square root of 665256315 is about 25792.5631723565. The cubic root of 665256315 is about 872.9640019849.

The spelling of 665256315 in words is "six hundred sixty-five million, two hundred fifty-six thousand, three hundred fifteen".