664344453 has 16 divisors (see below), whose sum is σ = 923503680. Its totient is φ = 424429824.

The previous prime is 664344451. The next prime is 664344467. The reversal of 664344453 is 354443466.

664344453 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 664344453 - 2¹ = 664344451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664344451) 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, 41748 + ... + 55421.

It is an arithmetic number, because the mean of its divisors is an integer number (57718980).

Almost surely, 2^664344453 is an apocalyptic number.

It is an amenable number.

664344453 is a deficient number, since it is larger than the sum of its proper divisors (259159227).

664344453 is a wasteful number, since it uses less digits than its factorization.

664344453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97268.

The product of its digits is 414720, while the sum is 39.

The square root of 664344453 is about 25774.8802713029. The cubic root of 664344453 is about 872.5649644706.

The spelling of 664344453 in words is "six hundred sixty-four million, three hundred forty-four thousand, four hundred fifty-three".