111660663789769 has 2 divisors, whose sum is σ = 111660663789770. Its totient is φ = 111660663789768.

The previous prime is 111660663789641. The next prime is 111660663789793. The reversal of 111660663789769 is 967987366066111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64723955814400 + 46936707975369 = 8045120^2 + 6851037^2 .

It is an emirp because it is prime and its reverse (967987366066111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111660663789769 - 2⁷ = 111660663789641 is a prime.

It is a super-2 number, since 2×111660663789769² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111660663789695 and 111660663789704.

It is not a weakly prime, because it can be changed into another prime (111630663789769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55830331894884 + 55830331894885.

It is an arithmetic number, because the mean of its divisors is an integer number (55830331894885).

Almost surely, 2^{111660663789769} is an apocalyptic number.

It is an amenable number.

111660663789769 is a deficient number, since it is larger than the sum of its proper divisors (1).

111660663789769 is an equidigital number, since it uses as much as digits as its factorization.

111660663789769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 740710656, while the sum is 76.

The spelling of 111660663789769 in words is "one hundred eleven trillion, six hundred sixty billion, six hundred sixty-three million, seven hundred eighty-nine thousand, seven hundred sixty-nine".