666345388604 has 12 divisors (see below), whose sum is σ = 1332690777264. Its totient is φ = 285576595104.

The previous prime is 666345388601. The next prime is 666345388609. The reversal of 666345388604 is 406883543666.

666345388604 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666345388601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11899024769 + ... + 11899024824.

It is an arithmetic number, because the mean of its divisors is an integer number (111057564772).

Almost surely, 2^666345388604 is an apocalyptic number.

It is an amenable number.

666345388604 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

666345388604 is a wasteful number, since it uses less digits than its factorization.

666345388604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23798049604 (or 23798049602 counting only the distinct ones).

The product of its (nonzero) digits is 59719680, while the sum is 59.

The spelling of 666345388604 in words is "six hundred sixty-six billion, three hundred forty-five million, three hundred eighty-eight thousand, six hundred four".