667688664412 has 48 divisors (see below), whose sum is σ = 1487770518528. Its totient is φ = 254603574720.

The previous prime is 667688664389. The next prime is 667688664439. The reversal of 667688664412 is 214466886766.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23047443 + ... + 23076394.

It is an arithmetic number, because the mean of its divisors is an integer number (30995219136).

Almost surely, 2^667688664412 is an apocalyptic number.

It is an amenable number.

667688664412 is an abundant number, since it is smaller than the sum of its proper divisors (820081854116).

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

667688664412 is a wasteful number, since it uses less digits than its factorization.

667688664412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46123906 (or 46123904 counting only the distinct ones).

The product of its digits is 111476736, while the sum is 64.

The spelling of 667688664412 in words is "six hundred sixty-seven billion, six hundred eighty-eight million, six hundred sixty-four thousand, four hundred twelve".