666687486874 has 16 divisors (see below), whose sum is σ = 1000865115360. Its totient is φ = 333065902320.

The previous prime is 666687486869. The next prime is 666687486931. The reversal of 666687486874 is 478684786666.

It is a self number, because there is not a number n which added to its sum of digits gives 666687486874.

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, 12012252 + ... + 12067624.

It is an arithmetic number, because the mean of its divisors is an integer number (62554069710).

Almost surely, 2^666687486874 is an apocalyptic number.

666687486874 is a deficient number, since it is larger than the sum of its proper divisors (334177628486).

666687486874 is a wasteful number, since it uses less digits than its factorization.

666687486874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60285.

The product of its digits is 3121348608, while the sum is 76.

The spelling of 666687486874 in words is "six hundred sixty-six billion, six hundred eighty-seven million, four hundred eighty-six thousand, eight hundred seventy-four".