666512606297 has 2 divisors, whose sum is σ = 666512606298. Its totient is φ = 666512606296.

The previous prime is 666512606269. The next prime is 666512606327. The reversal of 666512606297 is 792606215666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 666450180496 + 62425801 = 816364^2 + 7901^2 .

It is a cyclic number.

It is not a de Polignac number, because 666512606297 - 2⁶ = 666512606233 is a prime.

It is not a weakly prime, because it can be changed into another prime (666512606197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333256303148 + 333256303149.

It is an arithmetic number, because the mean of its divisors is an integer number (333256303149).

Almost surely, 2^666512606297 is an apocalyptic number.

It is an amenable number.

666512606297 is a deficient number, since it is larger than the sum of its proper divisors (1).

666512606297 is an equidigital number, since it uses as much as digits as its factorization.

666512606297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 56.

The spelling of 666512606297 in words is "six hundred sixty-six billion, five hundred twelve million, six hundred six thousand, two hundred ninety-seven".