664268522 has 8 divisors (see below), whose sum is σ = 1003090500. Its totient is φ = 329905024.

The previous prime is 664268503. The next prime is 664268587. The reversal of 664268522 is 225862466.

It can be written as a sum of positive squares in 2 ways, for example, as 651729841 + 12538681 = 25529^2 + 3541^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×664268522³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 664268522.

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, 1114247 + ... + 1114842.

Almost surely, 2^664268522 is an apocalyptic number.

664268522 is a deficient number, since it is larger than the sum of its proper divisors (338821978).

664268522 is a wasteful number, since it uses less digits than its factorization.

664268522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2229240.

The product of its digits is 276480, while the sum is 41.

The square root of 664268522 is about 25773.4072640774. The cubic root of 664268522 is about 872.5317200423.

The spelling of 664268522 in words is "six hundred sixty-four million, two hundred sixty-eight thousand, five hundred twenty-two".