11111166 has 48 divisors (see below), whose sum is σ = 27816048. Its totient is φ = 3168000.

The previous prime is 11111161. The next prime is 11111171. The reversal of 11111166 is 66111111.

It is an interprime number because it is at equal distance from previous prime (11111161) and next prime (11111171).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111161) 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, 1716 + ... + 5016.

It is an arithmetic number, because the mean of its divisors is an integer number (579501).

Almost surely, 2^11111166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11111166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13908024).

11111166 is an abundant number, since it is smaller than the sum of its proper divisors (16704882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11111166 is a wasteful number, since it uses less digits than its factorization.

11111166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337 (or 3334 counting only the distinct ones).

The product of its digits is 36, while the sum is 18.

The square root of 11111166 is about 3333.3415666565. The cubic root of 11111166 is about 223.1446841378.

Adding to 11111166 its reverse (66111111), we get a palindrome (77222277).

Subtracting 11111166 from its reverse (66111111), we obtain a palindrome (54999945).

The spelling of 11111166 in words is "eleven million, one hundred eleven thousand, one hundred sixty-six".