7311666737729 has 2 divisors, whose sum is σ = 7311666737730. Its totient is φ = 7311666737728.

The previous prime is 7311666737707. The next prime is 7311666737731. The reversal of 7311666737729 is 9277376661137.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4381486240000 + 2930180497729 = 2093200^2 + 1711777^2 .

It is a cyclic number.

It is not a de Polignac number, because 7311666737729 - 2³⁶ = 7242947260993 is a prime.

It is a super-2 number, since 2×7311666737729² (a number of 27 digits) contains 22 as substring.

Together with 7311666737731, 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 (7311666737759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3655833368864 + 3655833368865.

It is an arithmetic number, because the mean of its divisors is an integer number (3655833368865).

Almost surely, 2^{7311666737729} is an apocalyptic number.

It is an amenable number.

7311666737729 is a deficient number, since it is larger than the sum of its proper divisors (1).

7311666737729 is an equidigital number, since it uses as much as digits as its factorization.

7311666737729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84015792, while the sum is 65.

The spelling of 7311666737729 in words is "seven trillion, three hundred eleven billion, six hundred sixty-six million, seven hundred thirty-seven thousand, seven hundred twenty-nine".