664514572 has 6 divisors (see below), whose sum is σ = 1162900508. Its totient is φ = 332257284.

The previous prime is 664514549. The next prime is 664514573. The reversal of 664514572 is 275415466.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (664514573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83064318 + ... + 83064325.

Almost surely, 2^664514572 is an apocalyptic number.

It is an amenable number.

664514572 is a deficient number, since it is larger than the sum of its proper divisors (498385936).

664514572 is a wasteful number, since it uses less digits than its factorization.

664514572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166128647 (or 166128645 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The square root of 664514572 is about 25778.1801529899. The cubic root of 664514572 is about 872.6394374893.

The spelling of 664514572 in words is "six hundred sixty-four million, five hundred fourteen thousand, five hundred seventy-two".