669513264 has 60 divisors (see below), whose sum is σ = 2011962744. Its totient is φ = 191288832.

The previous prime is 669513263. The next prime is 669513277. The reversal of 669513264 is 462315966.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (669513263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139977 + ... + 144680.

Almost surely, 2^669513264 is an apocalyptic number.

It is an amenable number.

669513264 is an abundant number, since it is smaller than the sum of its proper divisors (1342449480).

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

669513264 is a wasteful number, since it uses less digits than its factorization.

669513264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284682 (or 284669 counting only the distinct ones).

The product of its digits is 233280, while the sum is 42.

The square root of 669513264 is about 25874.9543767714. The cubic root of 669513264 is about 874.8220651520.

The spelling of 669513264 in words is "six hundred sixty-nine million, five hundred thirteen thousand, two hundred sixty-four".