11661166011 has 16 divisors (see below), whose sum is σ = 16964592768. Its totient is φ = 7066166400.

The previous prime is 11661166009. The next prime is 11661166019. The reversal of 11661166011 is 11066116611.

It is not a de Polignac number, because 11661166011 - 2¹ = 11661166009 is a prime.

It is a super-2 number, since 2×11661166011² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11661166011.

It is not an unprimeable number, because it can be changed into a prime (11661166019) 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, 189955 + ... + 243731.

It is an arithmetic number, because the mean of its divisors is an integer number (1060287048).

Almost surely, 2^11661166011 is an apocalyptic number.

11661166011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11661166011 is a deficient number, since it is larger than the sum of its proper divisors (5303426757).

11661166011 is a wasteful number, since it uses less digits than its factorization.

11661166011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60362.

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 11661166011 in words is "eleven billion, six hundred sixty-one million, one hundred sixty-six thousand, eleven".