11685666 has 32 divisors (see below), whose sum is σ = 24364800. Its totient is φ = 3731840.

The previous prime is 11685643. The next prime is 11685721. The reversal of 11685666 is 66658611.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41446 + ... + 41726.

It is an arithmetic number, because the mean of its divisors is an integer number (761400).

Almost surely, 2^11685666 is an apocalyptic number.

11685666 is an abundant number, since it is smaller than the sum of its proper divisors (12679134).

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

11685666 is a wasteful number, since it uses less digits than its factorization.

11685666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554.

The product of its digits is 51840, while the sum is 39.

The square root of 11685666 is about 3418.4303415457. The cubic root of 11685666 is about 226.9261211062.

The spelling of 11685666 in words is "eleven million, six hundred eighty-five thousand, six hundred sixty-six".