669542372968 has 32 divisors (see below), whose sum is σ = 1435557951360. Its totient is φ = 286781872320.

The previous prime is 669542372963. The next prime is 669542372987. The reversal of 669542372968 is 869273245966.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (669542372963) 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, 3336196 + ... + 3531187.

It is an arithmetic number, because the mean of its divisors is an integer number (44861185980).

Almost surely, 2^669542372968 is an apocalyptic number.

It is an amenable number.

669542372968 is an abundant number, since it is smaller than the sum of its proper divisors (766015578392).

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

669542372968 is a wasteful number, since it uses less digits than its factorization.

669542372968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6869137 (or 6869133 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 67.

The spelling of 669542372968 in words is "six hundred sixty-nine billion, five hundred forty-two million, three hundred seventy-two thousand, nine hundred sixty-eight".