669652368 has 80 divisors (see below), whose sum is σ = 2156814336. Its totient is φ = 173934720.

The previous prime is 669652367. The next prime is 669652387. The reversal of 669652368 is 863256966.

It is a self number, because there is not a number n which added to its sum of digits gives 669652368.

It is not an unprimeable number, because it can be changed into a prime (669652367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86896 + ... + 94287.

Almost surely, 2^669652368 is an apocalyptic number.

It is an amenable number.

669652368 is an abundant number, since it is smaller than the sum of its proper divisors (1487161968).

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

669652368 is a wasteful number, since it uses less digits than its factorization.

669652368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181212 (or 181206 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 51.

The square root of 669652368 is about 25877.6422419045. The cubic root of 669652368 is about 874.8826478809.

The spelling of 669652368 in words is "six hundred sixty-nine million, six hundred fifty-two thousand, three hundred sixty-eight".