664484 has 12 divisors (see below), whose sum is σ = 1168944. Its totient is φ = 330504.

The previous prime is 664471. The next prime is 664507. The reversal of 664484 is 484466.

It is a plaindrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 664484.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 664484.

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, 839 + ... + 1425.

It is an arithmetic number, because the mean of its divisors is an integer number (97412).

2⁶⁶⁴⁴⁸⁴ is an apocalyptic number.

It is an amenable number.

664484 is a deficient number, since it is larger than the sum of its proper divisors (504460).

664484 is a wasteful number, since it uses less digits than its factorization.

664484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874 (or 872 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 664484 is about 815.1588802191. The cubic root of 664484 is about 87.2626054917.

It can be divided in two parts, 6644 and 84, that multiplied together give a triangular number (558096 = T₁₀₅₆).

The spelling of 664484 in words is "six hundred sixty-four thousand, four hundred eighty-four".