13340066731 has 2 divisors, whose sum is σ = 13340066732. Its totient is φ = 13340066730.

The previous prime is 13340066699. The next prime is 13340066741. The reversal of 13340066731 is 13766004331.

It is a strong prime.

It is an emirp because it is prime and its reverse (13766004331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13340066731 - 2⁵ = 13340066699 is a prime.

It is a super-2 number, since 2×13340066731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13340066741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6670033365 + 6670033366.

It is an arithmetic number, because the mean of its divisors is an integer number (6670033366).

Almost surely, 2^13340066731 is an apocalyptic number.

13340066731 is a deficient number, since it is larger than the sum of its proper divisors (1).

13340066731 is an equidigital number, since it uses as much as digits as its factorization.

13340066731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 34.

The spelling of 13340066731 in words is "thirteen billion, three hundred forty million, sixty-six thousand, seven hundred thirty-one".