666785688914 has 16 divisors (see below), whose sum is σ = 1000906934400. Its totient is φ = 333150130080.

The previous prime is 666785688889. The next prime is 666785688929. The reversal of 666785688914 is 419886587666.

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, 18200387 + ... + 18236985.

It is an arithmetic number, because the mean of its divisors is an integer number (62556683400).

Almost surely, 2^666785688914 is an apocalyptic number.

666785688914 is a deficient number, since it is larger than the sum of its proper divisors (334121245486).

666785688914 is a wasteful number, since it uses less digits than its factorization.

666785688914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42985.

The product of its digits is 836075520, while the sum is 74.

The spelling of 666785688914 in words is "six hundred sixty-six billion, seven hundred eighty-five million, six hundred eighty-eight thousand, nine hundred fourteen".