669713944686 has 32 divisors (see below), whose sum is σ = 1362058858368. Its totient is φ = 219469772640.

The previous prime is 669713944649. The next prime is 669713944721. The reversal of 669713944686 is 686449317966.

It is a self number, because there is not a number n which added to its sum of digits gives 669713944686.

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, 290521 + ... + 1193243.

It is an arithmetic number, because the mean of its divisors is an integer number (42564339324).

Almost surely, 2^669713944686 is an apocalyptic number.

669713944686 is an abundant number, since it is smaller than the sum of its proper divisors (692344913682).

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

669713944686 is a wasteful number, since it uses less digits than its factorization.

669713944686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904816.

The product of its digits is 282175488, while the sum is 69.

The spelling of 669713944686 in words is "six hundred sixty-nine billion, seven hundred thirteen million, nine hundred forty-four thousand, six hundred eighty-six".