664315615 has 16 divisors (see below), whose sum is σ = 827632800. Its totient is φ = 511281792.

The previous prime is 664315609. The next prime is 664315657. The reversal of 664315615 is 516513466.

It is a cyclic number.

It is not a de Polignac number, because 664315615 - 2¹¹ = 664313567 is a prime.

It is a congruent number.

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, 32941 + ... + 49129.

It is an arithmetic number, because the mean of its divisors is an integer number (51727050).

Almost surely, 2^664315615 is an apocalyptic number.

664315615 is a deficient number, since it is larger than the sum of its proper divisors (163317185).

664315615 is a wasteful number, since it uses less digits than its factorization.

664315615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16506.

The product of its digits is 64800, while the sum is 37.

The square root of 664315615 is about 25774.3208445926. The cubic root of 664315615 is about 872.5523387951.

The spelling of 664315615 in words is "six hundred sixty-four million, three hundred fifteen thousand, six hundred fifteen".