666846032812225 has 24 divisors (see below), whose sum is σ = 949071955328640. Its totient is φ = 455303336661120.

The previous prime is 666846032812217. The next prime is 666846032812283. The reversal of 666846032812225 is 522218230648666.

It is not a de Polignac number, because 666846032812225 - 2³ = 666846032812217 is a prime.

It is a super-2 number, since 2×666846032812225² (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 23 ways as a sum of consecutive naturals, for example, 8177102485 + ... + 8177184034.

It is an arithmetic number, because the mean of its divisors is an integer number (39544664805360).

Almost surely, 2^{666846032812225} is an apocalyptic number.

It is an amenable number.

666846032812225 is a deficient number, since it is larger than the sum of its proper divisors (282225922516415).

666846032812225 is a wasteful number, since it uses less digits than its factorization.

666846032812225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16354286769 (or 16354286764 counting only the distinct ones).

The product of its (nonzero) digits is 79626240, while the sum is 61.

The spelling of 666846032812225 in words is "six hundred sixty-six trillion, eight hundred forty-six billion, thirty-two million, eight hundred twelve thousand, two hundred twenty-five".