664592 has 20 divisors (see below), whose sum is σ = 1307580. Its totient is φ = 327168.

The previous prime is 664589. The next prime is 664597. The reversal of 664592 is 295466.

It can be written as a sum of positive squares in 2 ways, for example, as 234256 + 430336 = 484^2 + 656^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (664597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 884 + ... + 1452.

It is an arithmetic number, because the mean of its divisors is an integer number (65379).

2⁶⁶⁴⁵⁹² is an apocalyptic number.

It is an amenable number.

664592 is a deficient number, since it is larger than the sum of its proper divisors (642988).

664592 is a wasteful number, since it uses less digits than its factorization.

664592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 644 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 664592 is about 815.2251222822. The cubic root of 664592 is about 87.2673328947.

The spelling of 664592 in words is "six hundred sixty-four thousand, five hundred ninety-two".