666585776304 has 120 divisors (see below), whose sum is σ = 2189638599200. Its totient is φ = 185305688064.

The previous prime is 666585776291. The next prime is 666585776333. The reversal of 666585776304 is 403677585666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 23 ways as a sum of consecutive naturals, for example, 8899129 + ... + 8973720.

Almost surely, 2^666585776304 is an apocalyptic number.

It is an amenable number.

666585776304 is an abundant number, since it is smaller than the sum of its proper divisors (1523052822896).

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

666585776304 is a wasteful number, since it uses less digits than its factorization.

666585776304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17872907 (or 17872898 counting only the distinct ones).

The product of its (nonzero) digits is 152409600, while the sum is 63.

The spelling of 666585776304 in words is "six hundred sixty-six billion, five hundred eighty-five million, seven hundred seventy-six thousand, three hundred four".