12665476673 has 2 divisors, whose sum is σ = 12665476674. Its totient is φ = 12665476672.

The previous prime is 12665476657. The next prime is 12665476699. The reversal of 12665476673 is 37667456621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12146684944 + 518791729 = 110212^2 + 22777^2 .

It is a cyclic number.

It is not a de Polignac number, because 12665476673 - 2⁴ = 12665476657 is a prime.

It is not a weakly prime, because it can be changed into another prime (12665476613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6332738336 + 6332738337.

It is an arithmetic number, because the mean of its divisors is an integer number (6332738337).

Almost surely, 2^12665476673 is an apocalyptic number.

It is an amenable number.

12665476673 is a deficient number, since it is larger than the sum of its proper divisors (1).

12665476673 is an equidigital number, since it uses as much as digits as its factorization.

12665476673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 53.

The spelling of 12665476673 in words is "twelve billion, six hundred sixty-five million, four hundred seventy-six thousand, six hundred seventy-three".