12651666589 has 2 divisors, whose sum is σ = 12651666590. Its totient is φ = 12651666588.

The previous prime is 12651666499. The next prime is 12651666617. The reversal of 12651666589 is 98566615621.

12651666589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12156826564 + 494840025 = 110258^2 + 22245^2 .

It is a cyclic number.

It is not a de Polignac number, because 12651666589 - 2²⁹ = 12114795677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12651666889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6325833294 + 6325833295.

It is an arithmetic number, because the mean of its divisors is an integer number (6325833295).

Almost surely, 2^12651666589 is an apocalyptic number.

It is an amenable number.

12651666589 is a deficient number, since it is larger than the sum of its proper divisors (1).

12651666589 is an equidigital number, since it uses as much as digits as its factorization.

12651666589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 55.

The spelling of 12651666589 in words is "twelve billion, six hundred fifty-one million, six hundred sixty-six thousand, five hundred eighty-nine".