13166723513 has 2 divisors, whose sum is σ = 13166723514. Its totient is φ = 13166723512.

The previous prime is 13166723489. The next prime is 13166723587. The reversal of 13166723513 is 31532766131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13126743184 + 39980329 = 114572^2 + 6323^2 .

It is a cyclic number.

It is not a de Polignac number, because 13166723513 - 2²² = 13162529209 is a prime.

It is a super-2 number, since 2×13166723513² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13166423513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6583361756 + 6583361757.

It is an arithmetic number, because the mean of its divisors is an integer number (6583361757).

Almost surely, 2^13166723513 is an apocalyptic number.

It is an amenable number.

13166723513 is a deficient number, since it is larger than the sum of its proper divisors (1).

13166723513 is an equidigital number, since it uses as much as digits as its factorization.

13166723513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 38.

The spelling of 13166723513 in words is "thirteen billion, one hundred sixty-six million, seven hundred twenty-three thousand, five hundred thirteen".