666638632300 has 36 divisors (see below), whose sum is σ = 1464917315680. Its totient is φ = 263280064320.

The previous prime is 666638632291. The next prime is 666638632397. The reversal of 666638632300 is 3236836666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42184419 + ... + 42200218.

Almost surely, 2^666638632300 is an apocalyptic number.

It is an amenable number.

666638632300 is an abundant number, since it is smaller than the sum of its proper divisors (798278683380).

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

666638632300 is a wasteful number, since it uses less digits than its factorization.

666638632300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84384730 (or 84384723 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 49.

The spelling of 666638632300 in words is "six hundred sixty-six billion, six hundred thirty-eight million, six hundred thirty-two thousand, three hundred".