664115315 has 4 divisors (see below), whose sum is σ = 796938384. Its totient is φ = 531292248.

The previous prime is 664115279. The next prime is 664115329. The reversal of 664115315 is 513511466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664115315 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66411527 + ... + 66411536.

It is an arithmetic number, because the mean of its divisors is an integer number (199234596).

Almost surely, 2^664115315 is an apocalyptic number.

664115315 is a deficient number, since it is larger than the sum of its proper divisors (132823069).

664115315 is a wasteful number, since it uses less digits than its factorization.

664115315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132823068.

The product of its digits is 10800, while the sum is 32.

The square root of 664115315 is about 25770.4349012585. The cubic root of 664115315 is about 872.4646345985.

The spelling of 664115315 in words is "six hundred sixty-four million, one hundred fifteen thousand, three hundred fifteen".