11666885 has 4 divisors (see below), whose sum is σ = 14000268. Its totient is φ = 9333504.

The previous prime is 11666873. The next prime is 11666923. The reversal of 11666885 is 58866611.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3378244 + 8288641 = 1838^2 + 2879^2 .

It is a cyclic number.

It is not a de Polignac number, because 11666885 - 2¹⁰ = 11665861 is a prime.

It is a super-2 number, since 2×11666885² = 272232411206450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1166684 + ... + 1166693.

It is an arithmetic number, because the mean of its divisors is an integer number (3500067).

Almost surely, 2^11666885 is an apocalyptic number.

It is an amenable number.

11666885 is a deficient number, since it is larger than the sum of its proper divisors (2333383).

11666885 is an equidigital number, since it uses as much as digits as its factorization.

11666885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333382.

The product of its digits is 69120, while the sum is 41.

The square root of 11666885 is about 3415.6822158977. The cubic root of 11666885 is about 226.8044853421.

The spelling of 11666885 in words is "eleven million, six hundred sixty-six thousand, eight hundred eighty-five".