664584231 has 16 divisors (see below), whose sum is σ = 915452928. Its totient is φ = 428409600.

The previous prime is 664584229. The next prime is 664584233. The reversal of 664584231 is 132485466.

It is an interprime number because it is at equal distance from previous prime (664584229) and next prime (664584233).

It is not a de Polignac number, because 664584231 - 2¹ = 664584229 is a prime.

It is a super-2 number, since 2×664584231² = 883344400187722722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 664584231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664584233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155716 + ... + 159926.

It is an arithmetic number, because the mean of its divisors is an integer number (57215808).

Almost surely, 2^664584231 is an apocalyptic number.

664584231 is a deficient number, since it is larger than the sum of its proper divisors (250868697).

664584231 is a wasteful number, since it uses less digits than its factorization.

664584231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5942.

The product of its digits is 138240, while the sum is 39.

The square root of 664584231 is about 25779.5312408895. The cubic root of 664584231 is about 872.6699284518.

The spelling of 664584231 in words is "six hundred sixty-four million, five hundred eighty-four thousand, two hundred thirty-one".