664479 has 24 divisors (see below), whose sum is σ = 1050192. Its totient is φ = 403200.

The previous prime is 664471. The next prime is 664507. The reversal of 664479 is 974466.

664479 is a `hidden beast` number, since 6 + 644 + 7 + 9 = 666.

It is not a de Polignac number, because 664479 - 2³ = 664471 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 664479.

It is not an unprimeable number, because it can be changed into a prime (664471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6529 + ... + 6629.

It is an arithmetic number, because the mean of its divisors is an integer number (43758).

2⁶⁶⁴⁴⁷⁹ is an apocalyptic number.

664479 is a deficient number, since it is larger than the sum of its proper divisors (385713).

664479 is a wasteful number, since it uses less digits than its factorization.

664479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 164 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 664479 is about 815.1558133265. The cubic root of 664479 is about 87.2623866181.

The spelling of 664479 in words is "six hundred sixty-four thousand, four hundred seventy-nine".