666622376700725 has 24 divisors (see below), whose sum is σ = 830075718480000. Its totient is φ = 531063109866240.

The previous prime is 666622376700719. The next prime is 666622376700773. The reversal of 666622376700725 is 527007673226666.

It is a de Polignac number, because none of the positive numbers 2^k-666622376700725 is a prime.

It is a congruent number.

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, 1356611126 + ... + 1357102424.

It is an arithmetic number, because the mean of its divisors is an integer number (34586488270000).

Almost surely, 2^{666622376700725} is an apocalyptic number.

It is an amenable number.

666622376700725 is a deficient number, since it is larger than the sum of its proper divisors (163453341779275).

666622376700725 is a wasteful number, since it uses less digits than its factorization.

666622376700725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718637 (or 718632 counting only the distinct ones).

The product of its (nonzero) digits is 320060160, while the sum is 65.

The spelling of 666622376700725 in words is "six hundred sixty-six trillion, six hundred twenty-two billion, three hundred seventy-six million, seven hundred thousand, seven hundred twenty-five".