1166111109 has 24 divisors (see below), whose sum is σ = 1798505280. Its totient is φ = 726308352.

The previous prime is 1166111087. The next prime is 1166111119. The reversal of 1166111109 is 9011116611.

It is not a de Polignac number, because 1166111109 - 2²¹ = 1164013957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166111119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56604 + ... + 74405.

It is an arithmetic number, because the mean of its divisors is an integer number (74937720).

Almost surely, 2^1166111109 is an apocalyptic number.

It is an amenable number.

1166111109 is a deficient number, since it is larger than the sum of its proper divisors (632394171).

1166111109 is a wasteful number, since it uses less digits than its factorization.

1166111109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131081 (or 131078 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 27.

The square root of 1166111109 is about 34148.3690532945. The cubic root of 1166111109 is about 1052.5594729832.

The spelling of 1166111109 in words is "one billion, one hundred sixty-six million, one hundred eleven thousand, one hundred nine".