664453425 has 24 divisors (see below), whose sum is σ = 1106598816. Its totient is φ = 351783040.

The previous prime is 664453397. The next prime is 664453451. The reversal of 664453425 is 524354466.

It is not a de Polignac number, because 664453425 - 2⁵ = 664453393 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22059 + ... + 42608.

It is an arithmetic number, because the mean of its divisors is an integer number (46108284).

Almost surely, 2^664453425 is an apocalyptic number.

It is an amenable number.

664453425 is a deficient number, since it is larger than the sum of its proper divisors (442145391).

664453425 is a wasteful number, since it uses less digits than its factorization.

664453425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64817 (or 64812 counting only the distinct ones).

The product of its digits is 345600, while the sum is 39.

The square root of 664453425 is about 25776.9941032697. The cubic root of 664453425 is about 872.6126706219.

The spelling of 664453425 in words is "six hundred sixty-four million, four hundred fifty-three thousand, four hundred twenty-five".