7665123126613 has 2 divisors, whose sum is σ = 7665123126614. Its totient is φ = 7665123126612.

The previous prime is 7665123126587. The next prime is 7665123126643. The reversal of 7665123126613 is 3166213215667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6503713856644 + 1161409269969 = 2550238^2 + 1077687^2 .

It is a cyclic number.

It is not a de Polignac number, because 7665123126613 - 2²⁹ = 7664586255701 is a prime.

It is a super-2 number, since 2×7665123126613² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7665123126643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3832561563306 + 3832561563307.

It is an arithmetic number, because the mean of its divisors is an integer number (3832561563307).

Almost surely, 2^{7665123126613} is an apocalyptic number.

It is an amenable number.

7665123126613 is a deficient number, since it is larger than the sum of its proper divisors (1).

7665123126613 is an equidigital number, since it uses as much as digits as its factorization.

7665123126613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 49.

The spelling of 7665123126613 in words is "seven trillion, six hundred sixty-five billion, one hundred twenty-three million, one hundred twenty-six thousand, six hundred thirteen".