664356424010625 has 200 divisors, whose sum is σ = 1263822353640000. Its totient is φ = 347561519760000.

The previous prime is 664356424010603. The next prime is 664356424010651. The reversal of 664356424010625 is 526010424653466.

664356424010625 is a `hidden beast` number, since 6 + 6 + 4 + 3 + 5 + 6 + 4 + 2 + 4 + 0 + 1 + 0 + 625 = 666.

It is not a de Polignac number, because 664356424010625 - 2⁶ = 664356424010561 is a prime.

It is a super-2 number, since 2×664356424010625² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 199 ways as a sum of consecutive naturals, for example, 13412917110 + ... + 13412966640.

It is an arithmetic number, because the mean of its divisors is an integer number (6319111768200).

Almost surely, 2^{664356424010625} is an apocalyptic number.

It is an amenable number.

664356424010625 is a deficient number, since it is larger than the sum of its proper divisors (599465929629375).

664356424010625 is an equidigital number, since it uses as much as digits as its factorization.

664356424010625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54615 (or 54591 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 54.

The spelling of 664356424010625 in words is "six hundred sixty-four trillion, three hundred fifty-six billion, four hundred twenty-four million, ten thousand, six hundred twenty-five".