664425245 has 8 divisors (see below), whose sum is σ = 869793120. Its totient is φ = 483218320.

The previous prime is 664425239. The next prime is 664425247. The reversal of 664425245 is 542524466.

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

It is not a de Polignac number, because 664425245 - 2²⁶ = 597316381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664425199 and 664425208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664425247) 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, 6040175 + ... + 6040284.

It is an arithmetic number, because the mean of its divisors is an integer number (108724140).

Almost surely, 2^664425245 is an apocalyptic number.

It is an amenable number.

664425245 is a deficient number, since it is larger than the sum of its proper divisors (205367875).

664425245 is a wasteful number, since it uses less digits than its factorization.

664425245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12080475.

The product of its digits is 230400, while the sum is 38.

The square root of 664425245 is about 25776.4474860288. The cubic root of 664425245 is about 872.6003343809.

The spelling of 664425245 in words is "six hundred sixty-four million, four hundred twenty-five thousand, two hundred forty-five".