669172696 has 16 divisors (see below), whose sum is σ = 1295173440. Its totient is φ = 323793120.

The previous prime is 669172687. The next prime is 669172697. The reversal of 669172696 is 696271966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669172697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1348891 + ... + 1349386.

It is an arithmetic number, because the mean of its divisors is an integer number (80948340).

Almost surely, 2^669172696 is an apocalyptic number.

It is an amenable number.

669172696 is a deficient number, since it is larger than the sum of its proper divisors (626000744).

669172696 is a wasteful number, since it uses less digits than its factorization.

669172696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698314 (or 2698310 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 52.

The square root of 669172696 is about 25868.3725038898. The cubic root of 669172696 is about 874.6737051670.

The spelling of 669172696 in words is "six hundred sixty-nine million, one hundred seventy-two thousand, six hundred ninety-six".