11556868066 has 16 divisors (see below), whose sum is σ = 18249796800. Its totient is φ = 5473672848.

The previous prime is 11556868061. The next prime is 11556868067. The reversal of 11556868066 is 66086865511.

It is a super-2 number, since 2×11556868066² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11556868061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 572196 + ... + 592048.

It is an arithmetic number, because the mean of its divisors is an integer number (1140612300).

Almost surely, 2^11556868066 is an apocalyptic number.

11556868066 is a deficient number, since it is larger than the sum of its proper divisors (6692928734).

11556868066 is a wasteful number, since it uses less digits than its factorization.

11556868066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35193.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 11556868066 in words is "eleven billion, five hundred fifty-six million, eight hundred sixty-eight thousand, sixty-six".