664594 has 16 divisors (see below), whose sum is σ = 1171008. Its totient is φ = 276912.

The previous prime is 664589. The next prime is 664597. The reversal of 664594 is 495466.

It is a plaindrome in base 9.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124 + ... + 1159.

It is an arithmetic number, because the mean of its divisors is an integer number (73188).

2⁶⁶⁴⁵⁹⁴ is an apocalyptic number.

664594 is a deficient number, since it is larger than the sum of its proper divisors (506414).

664594 is a wasteful number, since it uses less digits than its factorization.

664594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329.

The product of its digits is 25920, while the sum is 34.

The square root of 664594 is about 815.2263489363. The cubic root of 664594 is about 87.2674204344.

The spelling of 664594 in words is "six hundred sixty-four thousand, five hundred ninety-four".