666730669776 has 20 divisors (see below), whose sum is σ = 1722387563712. Its totient is φ = 222243556576.

The previous prime is 666730669763. The next prime is 666730669783. The reversal of 666730669776 is 677966037666.

It is a self number, because there is not a number n which added to its sum of digits gives 666730669776.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6945111096 + ... + 6945111191.

Almost surely, 2^666730669776 is an apocalyptic number.

It is an amenable number.

666730669776 is an abundant number, since it is smaller than the sum of its proper divisors (1055656893936).

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

666730669776 is a wasteful number, since it uses less digits than its factorization.

666730669776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13890222298 (or 13890222292 counting only the distinct ones).

The product of its (nonzero) digits is 432081216, while the sum is 69.

The spelling of 666730669776 in words is "six hundred sixty-six billion, seven hundred thirty million, six hundred sixty-nine thousand, seven hundred seventy-six".