666632624 has 20 divisors (see below), whose sum is σ = 1476115344. Its totient is φ = 285699648.

The previous prime is 666632609. The next prime is 666632633. The reversal of 666632624 is 426236666.

It is a super-2 number, since 2×666632624² = 888798110762250752, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2975927 + ... + 2976150.

Almost surely, 2^666632624 is an apocalyptic number.

It is an amenable number.

666632624 is an abundant number, since it is smaller than the sum of its proper divisors (809482720).

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

666632624 is a wasteful number, since it uses less digits than its factorization.

666632624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5952092 (or 5952086 counting only the distinct ones).

The product of its digits is 373248, while the sum is 41.

The square root of 666632624 is about 25819.2297328948. The cubic root of 666632624 is about 873.5655949789.

The spelling of 666632624 in words is "six hundred sixty-six million, six hundred thirty-two thousand, six hundred twenty-four".