664485 has 16 divisors (see below), whose sum is σ = 1098240. Its totient is φ = 342720.

The previous prime is 664471. The next prime is 664507. The reversal of 664485 is 584466.

It is a happy number.

It is not a de Polignac number, because 664485 - 2⁶ = 664421 is a prime.

It is a plaindrome in base 9.

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 664485.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250 + ... + 1179.

It is an arithmetic number, because the mean of its divisors is an integer number (68640).

2⁶⁶⁴⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

664485 is a deficient number, since it is larger than the sum of its proper divisors (433755).

664485 is a wasteful number, since it uses less digits than its factorization.

664485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468.

The product of its digits is 23040, while the sum is 33.

The square root of 664485 is about 815.1594935962. The cubic root of 664485 is about 87.2626492663.

The spelling of 664485 in words is "six hundred sixty-four thousand, four hundred eighty-five".