13668817277 has 2 divisors, whose sum is σ = 13668817278. Its totient is φ = 13668817276.

The previous prime is 13668817247. The next prime is 13668817297. The reversal of 13668817277 is 77271886631.

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., 12451435396 + 1217381881 = 111586^2 + 34891^2 .

It is a cyclic number.

It is not a de Polignac number, because 13668817277 - 2⁶ = 13668817213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13668817247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6834408638 + 6834408639.

It is an arithmetic number, because the mean of its divisors is an integer number (6834408639).

Almost surely, 2^13668817277 is an apocalyptic number.

It is an amenable number.

13668817277 is a deficient number, since it is larger than the sum of its proper divisors (1).

13668817277 is an equidigital number, since it uses as much as digits as its factorization.

13668817277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4741632, while the sum is 56.

The spelling of 13668817277 in words is "thirteen billion, six hundred sixty-eight million, eight hundred seventeen thousand, two hundred seventy-seven".