664125 has 64 divisors (see below), whose sum is σ = 1437696. Its totient is φ = 264000.

The previous prime is 664123. The next prime is 664133. The reversal of 664125 is 521466.

It is not a de Polignac number, because 664125 - 2¹ = 664123 is a prime.

It is a super-3 number, since 3×664125³ = 878760933380859375, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 664095 and 664104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28864 + ... + 28886.

It is an arithmetic number, because the mean of its divisors is an integer number (22464).

2⁶⁶⁴¹²⁵ is an apocalyptic number.

It is an amenable number.

664125 is an abundant number, since it is smaller than the sum of its proper divisors (773571).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664125 is a wasteful number, since it uses less digits than its factorization.

664125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59 (or 49 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 664125 is about 814.9386479975. The cubic root of 664125 is about 87.2468875719.

It can be divided in two parts, 6641 and 25, that added together give a palindrome (6666).

The spelling of 664125 in words is "six hundred sixty-four thousand, one hundred twenty-five".