664168584 has 32 divisors (see below), whose sum is σ = 1669036320. Its totient is φ = 220240896.

The previous prime is 664168567. The next prime is 664168621. The reversal of 664168584 is 485861466.

It is a super-2 number, since 2×664168584² = 882239815945130112, which contains 22 as substring.

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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67062 + ... + 76325.

It is an arithmetic number, because the mean of its divisors is an integer number (52157385).

Almost surely, 2^664168584 is an apocalyptic number.

It is an amenable number.

664168584 is an abundant number, since it is smaller than the sum of its proper divisors (1004867736).

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

664168584 is a wasteful number, since it uses less digits than its factorization.

664168584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143589 (or 143585 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 48.

The square root of 664168584 is about 25771.4684098520. The cubic root of 664168584 is about 872.4879609070.

The spelling of 664168584 in words is "six hundred sixty-four million, one hundred sixty-eight thousand, five hundred eighty-four".