669918288 has 40 divisors (see below), whose sum is σ = 1863748768. Its totient is φ = 206128512.

The previous prime is 669918259. The next prime is 669918289. The reversal of 669918288 is 882819966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669918289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536170 + ... + 537417.

Almost surely, 2^669918288 is an apocalyptic number.

It is an amenable number.

669918288 is an abundant number, since it is smaller than the sum of its proper divisors (1193830480).

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

669918288 is a wasteful number, since it uses less digits than its factorization.

669918288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073611 (or 1073605 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 57.

The square root of 669918288 is about 25882.7797579781. The cubic root of 669918288 is about 874.9984383101.

The spelling of 669918288 in words is "six hundred sixty-nine million, nine hundred eighteen thousand, two hundred eighty-eight".