664115250 has 32 divisors (see below), whose sum is σ = 1657633536. Its totient is φ = 177097200.

The previous prime is 664115233. The next prime is 664115261. The reversal of 664115250 is 52511466.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 441994 + ... + 443493.

It is an arithmetic number, because the mean of its divisors is an integer number (51801048).

Almost surely, 2^664115250 is an apocalyptic number.

664115250 is an abundant number, since it is smaller than the sum of its proper divisors (993518286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664115250 is a wasteful number, since it uses less digits than its factorization.

664115250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885507 (or 885497 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 664115250 is about 25770.4336401233. The cubic root of 664115250 is about 872.4646061345.

The spelling of 664115250 in words is "six hundred sixty-four million, one hundred fifteen thousand, two hundred fifty".