664253 has 2 divisors, whose sum is σ = 664254. Its totient is φ = 664252.

The previous prime is 664243. The next prime is 664271. The reversal of 664253 is 352466.

664253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 573049 + 91204 = 757^2 + 302^2 .

It is a cyclic number.

It is not a de Polignac number, because 664253 - 2⁸ = 663997 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332126 + 332127.

It is an arithmetic number, because the mean of its divisors is an integer number (332127).

2⁶⁶⁴²⁵³ is an apocalyptic number.

It is an amenable number.

664253 is a deficient number, since it is larger than the sum of its proper divisors (1).

664253 is an equidigital number, since it uses as much as digits as its factorization.

664253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 26.

The square root of 664253 is about 815.0171777331. The cubic root of 664253 is about 87.2524923823.

The spelling of 664253 in words is "six hundred sixty-four thousand, two hundred fifty-three".