2661105289769 has 2 divisors, whose sum is σ = 2661105289770. Its totient is φ = 2661105289768.

The previous prime is 2661105289753. The next prime is 2661105289781. The reversal of 2661105289769 is 9679825011662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2083865473600 + 577239816169 = 1443560^2 + 759763^2 .

It is a cyclic number.

It is not a de Polignac number, because 2661105289769 - 2⁴ = 2661105289753 is a prime.

It is a super-2 number, since 2×2661105289769² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2661105219769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330552644884 + 1330552644885.

It is an arithmetic number, because the mean of its divisors is an integer number (1330552644885).

Almost surely, 2^{2661105289769} is an apocalyptic number.

It is an amenable number.

2661105289769 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661105289769 is an equidigital number, since it uses as much as digits as its factorization.

2661105289769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19595520, while the sum is 62.

The spelling of 2661105289769 in words is "two trillion, six hundred sixty-one billion, one hundred five million, two hundred eighty-nine thousand, seven hundred sixty-nine".