669090288 has 20 divisors (see below), whose sum is σ = 1728483368. Its totient is φ = 223030080.

The previous prime is 669090269. The next prime is 669090319. The reversal of 669090288 is 882090966.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 13939381 = 669090288 / (6 + 6 + 9 + 0 + 9 + 0 + 2 + 8 + 8).

It is a congruent number.

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, 6969643 + ... + 6969738.

Almost surely, 2^669090288 is an apocalyptic number.

It is an amenable number.

669090288 is an abundant number, since it is smaller than the sum of its proper divisors (1059393080).

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

669090288 is a wasteful number, since it uses less digits than its factorization.

669090288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13939392 (or 13939386 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 669090288 is about 25866.7796217465. The cubic root of 669090288 is about 874.6377986064.

The spelling of 669090288 in words is "six hundred sixty-nine million, ninety thousand, two hundred eighty-eight".