13661334689 has 2 divisors, whose sum is σ = 13661334690. Its totient is φ = 13661334688.

The previous prime is 13661334611. The next prime is 13661334697. The reversal of 13661334689 is 98643316631.

13661334689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11021430289 + 2639904400 = 104983^2 + 51380^2 .

It is a cyclic number.

It is not a de Polignac number, because 13661334689 - 2²⁴ = 13644557473 is a prime.

It is not a weakly prime, because it can be changed into another prime (13661337689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6830667344 + 6830667345.

It is an arithmetic number, because the mean of its divisors is an integer number (6830667345).

Almost surely, 2^13661334689 is an apocalyptic number.

It is an amenable number.

13661334689 is a deficient number, since it is larger than the sum of its proper divisors (1).

13661334689 is an equidigital number, since it uses as much as digits as its factorization.

13661334689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 50.

The spelling of 13661334689 in words is "thirteen billion, six hundred sixty-one million, three hundred thirty-four thousand, six hundred eighty-nine".