664635253 has 8 divisors (see below), whose sum is σ = 687859200. Its totient is φ = 641431728.

The previous prime is 664635241. The next prime is 664635259. The reversal of 664635253 is 352536466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664635253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664635259) 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, 94000 + ... + 100822.

It is an arithmetic number, because the mean of its divisors is an integer number (85982400).

Almost surely, 2^664635253 is an apocalyptic number.

It is an amenable number.

664635253 is a deficient number, since it is larger than the sum of its proper divisors (23223947).

664635253 is a wasteful number, since it uses less digits than its factorization.

664635253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10211.

The product of its digits is 388800, while the sum is 40.

The square root of 664635253 is about 25780.5208054453. The cubic root of 664635253 is about 872.6922603217.

The spelling of 664635253 in words is "six hundred sixty-four million, six hundred thirty-five thousand, two hundred fifty-three".