12111666 has 32 divisors (see below), whose sum is σ = 28211328. Its totient is φ = 3394560.

The previous prime is 12111601. The next prime is 12111707. The reversal of 12111666 is 66611121.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 495 + ... + 4946.

It is an arithmetic number, because the mean of its divisors is an integer number (881604).

Almost surely, 2^12111666 is an apocalyptic number.

12111666 is an abundant number, since it is smaller than the sum of its proper divisors (16099662).

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

12111666 is a wasteful number, since it uses less digits than its factorization.

12111666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5506.

The product of its digits is 432, while the sum is 24.

The square root of 12111666 is about 3480.1818917982. The cubic root of 12111666 is about 229.6507996432.

Adding to 12111666 its reverse (66611121), we get a palindrome (78722787).

The spelling of 12111666 in words is "twelve million, one hundred eleven thousand, six hundred sixty-six".