664115155 has 12 divisors (see below), whose sum is σ = 875974176. Its totient is φ = 482992400.

The previous prime is 664115147. The next prime is 664115161. The reversal of 664115155 is 551511466.

It is not a de Polignac number, because 664115155 - 2³ = 664115147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664115155.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 548251 + ... + 549460.

It is an arithmetic number, because the mean of its divisors is an integer number (72997848).

Almost surely, 2^664115155 is an apocalyptic number.

664115155 is a deficient number, since it is larger than the sum of its proper divisors (211859021).

664115155 is a wasteful number, since it uses less digits than its factorization.

664115155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097738 (or 1097727 counting only the distinct ones).

The product of its digits is 18000, while the sum is 34.

The square root of 664115155 is about 25770.4317969257. The cubic root of 664115155 is about 872.4645645332.

The spelling of 664115155 in words is "six hundred sixty-four million, one hundred fifteen thousand, one hundred fifty-five".