664185 has 8 divisors (see below), whose sum is σ = 1062720. Its totient is φ = 354224.

The previous prime is 664177. The next prime is 664193. The reversal of 664185 is 581466.

It is an interprime number because it is at equal distance from previous prime (664177) and next prime (664193).

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 664185 - 2³ = 664177 is a prime.

It is a super-2 number, since 2×664185² = 882283428450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22125 + ... + 22154.

It is an arithmetic number, because the mean of its divisors is an integer number (132840).

2⁶⁶⁴¹⁸⁵ is an apocalyptic number.

It is an amenable number.

664185 is a deficient number, since it is larger than the sum of its proper divisors (398535).

664185 is a wasteful number, since it uses less digits than its factorization.

664185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44287.

The product of its digits is 5760, while the sum is 30.

The square root of 664185 is about 814.9754597532. The cubic root of 664185 is about 87.2495149164.

The spelling of 664185 in words is "six hundred sixty-four thousand, one hundred eighty-five".