664585 has 8 divisors (see below), whose sum is σ = 832320. Its totient is φ = 508464.

The previous prime is 664583. The next prime is 664589. The reversal of 664585 is 585466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664585 - 2¹ = 664583 is a prime.

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 664585.

It is not an unprimeable number, because it can be changed into a prime (664583) 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, 2775 + ... + 3004.

It is an arithmetic number, because the mean of its divisors is an integer number (104040).

2⁶⁶⁴⁵⁸⁵ is an apocalyptic number.

It is an amenable number.

664585 is a deficient number, since it is larger than the sum of its proper divisors (167735).

664585 is a wasteful number, since it uses less digits than its factorization.

664585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5807.

The product of its digits is 28800, while the sum is 34.

The square root of 664585 is about 815.2208289783. The cubic root of 664585 is about 87.2670265045.

The spelling of 664585 in words is "six hundred sixty-four thousand, five hundred eighty-five".