669742453988 has 12 divisors (see below), whose sum is σ = 1172387377392. Its totient is φ = 334774631880.

The previous prime is 669742453981. The next prime is 669742454033. The reversal of 669742453988 is 889354247966.

It is not an unprimeable number, because it can be changed into a prime (669742453981) 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 3 ways as a sum of consecutive naturals, for example, 24133178 + ... + 24160913.

It is an arithmetic number, because the mean of its divisors is an integer number (97698948116).

Almost surely, 2^669742453988 is an apocalyptic number.

It is an amenable number.

669742453988 is a deficient number, since it is larger than the sum of its proper divisors (502644923404).

669742453988 is a wasteful number, since it uses less digits than its factorization.

669742453988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48297562 (or 48297560 counting only the distinct ones).

The product of its digits is 627056640, while the sum is 71.

The spelling of 669742453988 in words is "six hundred sixty-nine billion, seven hundred forty-two million, four hundred fifty-three thousand, nine hundred eighty-eight".