669806975964 has 96 divisors (see below), whose sum is σ = 1867109171200. Its totient is φ = 182855724480.

The previous prime is 669806975921. The next prime is 669806975983. The reversal of 669806975964 is 469579608966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1422274 + ... + 1833705.

Almost surely, 2^669806975964 is an apocalyptic number.

It is an amenable number.

669806975964 is an abundant number, since it is smaller than the sum of its proper divisors (1197302195236).

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

669806975964 is a wasteful number, since it uses less digits than its factorization.

669806975964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3256103 (or 3256101 counting only the distinct ones).

The product of its (nonzero) digits is 1058158080, while the sum is 75.

The spelling of 669806975964 in words is "six hundred sixty-nine billion, eight hundred six million, nine hundred seventy-five thousand, nine hundred sixty-four".