12664136741 has 2 divisors, whose sum is σ = 12664136742. Its totient is φ = 12664136740.

The previous prime is 12664136731. The next prime is 12664136783. The reversal of 12664136741 is 14763146621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8928360100 + 3735776641 = 94490^2 + 61121^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12664136741 is a prime.

It is a super-2 number, since 2×12664136741² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12664136731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6332068370 + 6332068371.

It is an arithmetic number, because the mean of its divisors is an integer number (6332068371).

Almost surely, 2^12664136741 is an apocalyptic number.

It is an amenable number.

12664136741 is a deficient number, since it is larger than the sum of its proper divisors (1).

12664136741 is an equidigital number, since it uses as much as digits as its factorization.

12664136741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The spelling of 12664136741 in words is "twelve billion, six hundred sixty-four million, one hundred thirty-six thousand, seven hundred forty-one".