664250 has 16 divisors (see below), whose sum is σ = 1243944. Its totient is φ = 265600.

The previous prime is 664243. The next prime is 664253. The reversal of 664250 is 52466.

It can be written as a sum of positive squares in 4 ways, for example, as 243049 + 421201 = 493^2 + 649^2 .

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 664250.

It is not an unprimeable number, because it can be changed into a prime (664253) 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, 1079 + ... + 1578.

2⁶⁶⁴²⁵⁰ is an apocalyptic number.

664250 is a deficient number, since it is larger than the sum of its proper divisors (579694).

664250 is a wasteful number, since it uses less digits than its factorization.

664250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2674 (or 2664 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 664250 is about 815.0153372790. The cubic root of 664250 is about 87.2523610278.

The spelling of 664250 in words is "six hundred sixty-four thousand, two hundred fifty".