11665666060601 has 16 divisors (see below), whose sum is σ = 13381738713600. Its totient is φ = 9961982588160.

The previous prime is 11665666060597. The next prime is 11665666060649. The reversal of 11665666060601 is 10606066656611.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11665666060601 - 2² = 11665666060597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11665666060601.

It is not an unprimeable number, because it can be changed into a prime (11665666060801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114939725 + ... + 115041173.

It is an arithmetic number, because the mean of its divisors is an integer number (836358669600).

Almost surely, 2^{11665666060601} is an apocalyptic number.

It is an amenable number.

11665666060601 is a deficient number, since it is larger than the sum of its proper divisors (1716072652999).

11665666060601 is a wasteful number, since it uses less digits than its factorization.

11665666060601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162344.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 11665666060601 in words is "eleven trillion, six hundred sixty-five billion, six hundred sixty-six million, sixty thousand, six hundred one".