666554526630 has 40 divisors (see below), whose sum is σ = 1792291062672. Its totient is φ = 177747873552.

The previous prime is 666554526527. The next prime is 666554526643. The reversal of 666554526630 is 36625455666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 411452602 + ... + 411454221.

Almost surely, 2^666554526630 is an apocalyptic number.

666554526630 is an abundant number, since it is smaller than the sum of its proper divisors (1125736536042).

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

666554526630 is a wasteful number, since it uses less digits than its factorization.

666554526630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822906842 (or 822906833 counting only the distinct ones).

The product of its (nonzero) digits is 23328000, while the sum is 54.

The spelling of 666554526630 in words is "six hundred sixty-six billion, five hundred fifty-four million, five hundred twenty-six thousand, six hundred thirty".