664607253 has 16 divisors (see below), whose sum is σ = 909014400. Its totient is φ = 431665920.

The previous prime is 664607249. The next prime is 664607303. The reversal of 664607253 is 352706466.

664607253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664607253 - 2² = 664607249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664607753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96168 + ... + 102846.

It is an arithmetic number, because the mean of its divisors is an integer number (56813400).

Almost surely, 2^664607253 is an apocalyptic number.

It is an amenable number.

664607253 is a deficient number, since it is larger than the sum of its proper divisors (244407147).

664607253 is a wasteful number, since it uses less digits than its factorization.

664607253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7532.

The product of its (nonzero) digits is 181440, while the sum is 39.

The square root of 664607253 is about 25779.9777540633. The cubic root of 664607253 is about 872.6800051154.

The spelling of 664607253 in words is "six hundred sixty-four million, six hundred seven thousand, two hundred fifty-three".