12642666024881 has 2 divisors, whose sum is σ = 12642666024882. Its totient is φ = 12642666024880.

The previous prime is 12642666024749. The next prime is 12642666024883. The reversal of 12642666024881 is 18842066624621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7602102210481 + 5040563814400 = 2757191^2 + 2245120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12642666024881 is a prime.

It is a super-2 number, since 2×12642666024881² (a number of 27 digits) contains 22 as substring.

Together with 12642666024883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12642666024883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6321333012440 + 6321333012441.

It is an arithmetic number, because the mean of its divisors is an integer number (6321333012441).

Almost surely, 2^{12642666024881} is an apocalyptic number.

It is an amenable number.

12642666024881 is a deficient number, since it is larger than the sum of its proper divisors (1).

12642666024881 is an equidigital number, since it uses as much as digits as its factorization.

12642666024881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10616832, while the sum is 56.

The spelling of 12642666024881 in words is "twelve trillion, six hundred forty-two billion, six hundred sixty-six million, twenty-four thousand, eight hundred eighty-one".