664132275 has 18 divisors (see below), whose sum is σ = 1189535100. Its totient is φ = 354203760.

The previous prime is 664132247. The next prime is 664132283. The reversal of 664132275 is 572231466.

664132275 is a `hidden beast` number, since 6 + 641 + 3 + 2 + 2 + 7 + 5 = 666.

It is not a de Polignac number, because 664132275 - 2⁹ = 664131763 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1475625 + ... + 1476074.

Almost surely, 2^664132275 is an apocalyptic number.

664132275 is a deficient number, since it is larger than the sum of its proper divisors (525402825).

664132275 is a wasteful number, since it uses less digits than its factorization.

664132275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951715 (or 2951707 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 664132275 is about 25770.7639584084. The cubic root of 664132275 is about 872.4720614585.

The spelling of 664132275 in words is "six hundred sixty-four million, one hundred thirty-two thousand, two hundred seventy-five".