669556692 has 60 divisors (see below), whose sum is σ = 2000410720. Its totient is φ = 191301264.

The previous prime is 669556649. The next prime is 669556733. The reversal of 669556692 is 296655966.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 145342 + ... + 149877.

Almost surely, 2^669556692 is an apocalyptic number.

It is an amenable number.

669556692 is an abundant number, since it is smaller than the sum of its proper divisors (1330854028).

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

669556692 is a wasteful number, since it uses less digits than its factorization.

669556692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295242 (or 295231 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 54.

The square root of 669556692 is about 25875.7935530488. The cubic root of 669556692 is about 874.8409798638.

The spelling of 669556692 in words is "six hundred sixty-nine million, five hundred fifty-six thousand, six hundred ninety-two".