666330755904 has 336 divisors, whose sum is σ = 2127285763200. Its totient is φ = 197718528000.

The previous prime is 666330755899. The next prime is 666330755929. The reversal of 666330755904 is 409557033666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67023574 + ... + 67033514.

Almost surely, 2^666330755904 is an apocalyptic number.

666330755904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666330755904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1063642881600).

666330755904 is an abundant number, since it is smaller than the sum of its proper divisors (1460955007296).

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

666330755904 is a wasteful number, since it uses less digits than its factorization.

666330755904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10190 (or 10177 counting only the distinct ones).

The product of its (nonzero) digits is 12247200, while the sum is 54.

The spelling of 666330755904 in words is "six hundred sixty-six billion, three hundred thirty million, seven hundred fifty-five thousand, nine hundred four".