666373117628 has 24 divisors (see below), whose sum is σ = 1252141045344. Its totient is φ = 309170624000.

The previous prime is 666373117607. The next prime is 666373117667. The reversal of 666373117628 is 826711373666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69006473 + ... + 69016128.

It is an arithmetic number, because the mean of its divisors is an integer number (52172543556).

Almost surely, 2^666373117628 is an apocalyptic number.

666373117628 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

666373117628 is a deficient number, since it is larger than the sum of its proper divisors (585767927716).

666373117628 is a wasteful number, since it uses less digits than its factorization.

666373117628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138022693 (or 138022691 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 56.

The spelling of 666373117628 in words is "six hundred sixty-six billion, three hundred seventy-three million, one hundred seventeen thousand, six hundred twenty-eight".