664363425 has 24 divisors (see below), whose sum is σ = 1198271520. Its totient is φ = 322115200.

The previous prime is 664363369. The next prime is 664363429. The reversal of 664363425 is 524363466.

It is not a de Polignac number, because 664363425 - 2⁸ = 664363169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664363429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 401820 + ... + 403469.

It is an arithmetic number, because the mean of its divisors is an integer number (49927980).

Almost surely, 2^664363425 is an apocalyptic number.

It is an amenable number.

664363425 is a deficient number, since it is larger than the sum of its proper divisors (533908095).

664363425 is a wasteful number, since it uses less digits than its factorization.

664363425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805313 (or 805308 counting only the distinct ones).

The product of its digits is 311040, while the sum is 39.

The square root of 664363425 is about 25775.2483014228. The cubic root of 664363425 is about 872.5732704756.

The spelling of 664363425 in words is "six hundred sixty-four million, three hundred sixty-three thousand, four hundred twenty-five".