669309288 has 16 divisors (see below), whose sum is σ = 1673273280. Its totient is φ = 223103088.

The previous prime is 669309271. The next prime is 669309293. The reversal of 669309288 is 882903966.

It is a self number, because there is not a number n which added to its sum of digits gives 669309288.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13943920 + ... + 13943967.

It is an arithmetic number, because the mean of its divisors is an integer number (104579580).

Almost surely, 2^669309288 is an apocalyptic number.

It is an amenable number.

669309288 is an abundant number, since it is smaller than the sum of its proper divisors (1003963992).

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

669309288 is a wasteful number, since it uses less digits than its factorization.

669309288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27887896 (or 27887892 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 669309288 is about 25871.0125043455. The cubic root of 669309288 is about 874.7332141215.

The spelling of 669309288 in words is "six hundred sixty-nine million, three hundred nine thousand, two hundred eighty-eight".