664792 has 16 divisors (see below), whose sum is σ = 1301040. Its totient is φ = 317856.

The previous prime is 664789. The next prime is 664793. The reversal of 664792 is 297466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1623 + ... + 1990.

It is an arithmetic number, because the mean of its divisors is an integer number (81315).

2⁶⁶⁴⁷⁹² is an apocalyptic number.

It is an amenable number.

664792 is a deficient number, since it is larger than the sum of its proper divisors (636248).

664792 is a wasteful number, since it uses less digits than its factorization.

664792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3642 (or 3638 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 664792 is about 815.3477785583. The cubic root of 664792 is about 87.2760859924.

It can be divided in two parts, 6647 and 92, that multiplied together give a square (611524 = 782²).

The spelling of 664792 in words is "six hundred sixty-four thousand, seven hundred ninety-two".