669404716318 has 16 divisors (see below), whose sum is σ = 1081364220720. Its totient is φ = 308950839936.

The previous prime is 669404716313. The next prime is 669404716327. The reversal of 669404716318 is 813617404966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669404716313) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1676646 + ... + 2037142.

It is an arithmetic number, because the mean of its divisors is an integer number (67585263795).

Almost surely, 2^669404716318 is an apocalyptic number.

669404716318 is a deficient number, since it is larger than the sum of its proper divisors (411959504402).

669404716318 is a wasteful number, since it uses less digits than its factorization.

669404716318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431931.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 669404716318 in words is "six hundred sixty-nine billion, four hundred four million, seven hundred sixteen thousand, three hundred eighteen".