11556066111 has 16 divisors (see below), whose sum is σ = 16470155520. Its totient is φ = 7189350080.

The previous prime is 11556066103. The next prime is 11556066113. The reversal of 11556066111 is 11166065511.

It is a cyclic number.

It is not a de Polignac number, because 11556066111 - 2³ = 11556066103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11556066113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2039601 + ... + 2045258.

It is an arithmetic number, because the mean of its divisors is an integer number (1029384720).

Almost surely, 2^11556066111 is an apocalyptic number.

11556066111 is a deficient number, since it is larger than the sum of its proper divisors (4914089409).

11556066111 is a wasteful number, since it uses less digits than its factorization.

11556066111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4084926.

The product of its (nonzero) digits is 5400, while the sum is 33.

The spelling of 11556066111 in words is "eleven billion, five hundred fifty-six million, sixty-six thousand, one hundred eleven".