669134574706968 has 128 divisors (see below), whose sum is σ = 1969150394635200. Its totient is φ = 209806436155392.

The previous prime is 669134574706921. The next prime is 669134574706987. The reversal of 669134574706968 is 869607475431966.

669134574706968 is a `hidden beast` number, since 6 + 6 + 9 + 1 + 3 + 4 + 57 + 470 + 6 + 96 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44748405 + ... + 57798692.

Almost surely, 2^{669134574706968} is an apocalyptic number.

669134574706968 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

669134574706968 is an abundant number, since it is smaller than the sum of its proper divisors (1300015819928232).

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

669134574706968 is a wasteful number, since it uses less digits than its factorization.

669134574706968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102548906 (or 102548896 counting only the distinct ones).

The product of its (nonzero) digits is 9876142080, while the sum is 81.

The spelling of 669134574706968 in words is "six hundred sixty-nine trillion, one hundred thirty-four billion, five hundred seventy-four million, seven hundred six thousand, nine hundred sixty-eight".