665714602490671 has 2 divisors, whose sum is σ = 665714602490672. Its totient is φ = 665714602490670.

The previous prime is 665714602490659. The next prime is 665714602490741. The reversal of 665714602490671 is 176094206417566.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665714602490671 - 2¹⁵ = 665714602457903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665714602490071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332857301245335 + 332857301245336.

It is an arithmetic number, because the mean of its divisors is an integer number (332857301245336).

Almost surely, 2^{665714602490671} is an apocalyptic number.

665714602490671 is a deficient number, since it is larger than the sum of its proper divisors (1).

665714602490671 is an equidigital number, since it uses as much as digits as its factorization.

665714602490671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91445760, while the sum is 64.

The spelling of 665714602490671 in words is "six hundred sixty-five trillion, seven hundred fourteen billion, six hundred two million, four hundred ninety thousand, six hundred seventy-one".