11666055611 has 16 divisors (see below), whose sum is σ = 13572691200. Its totient is φ = 9820340640.

The previous prime is 11666055589. The next prime is 11666055623. The reversal of 11666055611 is 11655066611.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11666055611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11666055671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117665 + ... + 192813.

It is an arithmetic number, because the mean of its divisors is an integer number (848293200).

Almost surely, 2^11666055611 is an apocalyptic number.

11666055611 is a deficient number, since it is larger than the sum of its proper divisors (1906635589).

11666055611 is an equidigital number, since it uses as much as digits as its factorization.

11666055611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75554.

The product of its (nonzero) digits is 32400, while the sum is 38.

It can be divided in two parts, 116660 and 55611, that added together give a palindrome (172271).

The spelling of 11666055611 in words is "eleven billion, six hundred sixty-six million, fifty-five thousand, six hundred eleven".