11661066605105 has 8 divisors (see below), whose sum is σ = 13996649389992. Its totient is φ = 9326606974848.

The previous prime is 11661066605051. The next prime is 11661066605113. The reversal of 11661066605105 is 50150666016611.

11661066605105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 102752943601 + 11558313661504 = 320551^2 + 3399752^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11661066605105 - 2¹⁰ = 11661066604081 is a prime.

It is a super-2 number, since 2×11661066605105² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280765814 + ... + 280807343.

It is an arithmetic number, because the mean of its divisors is an integer number (1749581173749).

Almost surely, 2^{11661066605105} is an apocalyptic number.

It is an amenable number.

11661066605105 is a deficient number, since it is larger than the sum of its proper divisors (2335582784887).

11661066605105 is an equidigital number, since it uses as much as digits as its factorization.

11661066605105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561577315.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 11661066605105 in words is "eleven trillion, six hundred sixty-one billion, sixty-six million, six hundred five thousand, one hundred five".