664252 has 6 divisors (see below), whose sum is σ = 1162448. Its totient is φ = 332124.

The previous prime is 664243. The next prime is 664253. The reversal of 664252 is 252466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664253) by changing a digit.

664252 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83028 + ... + 83035.

2⁶⁶⁴²⁵² is an apocalyptic number.

It is an amenable number.

664252 is a deficient number, since it is larger than the sum of its proper divisors (498196).

664252 is a wasteful number, since it uses less digits than its factorization.

664252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166067 (or 166065 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 664252 is about 815.0165642489. The cubic root of 664252 is about 87.2524485975.

The spelling of 664252 in words is "six hundred sixty-four thousand, two hundred fifty-two".