11865666 has 8 divisors (see below), whose sum is σ = 23731344. Its totient is φ = 3955220.

The previous prime is 11865649. The next prime is 11865673. The reversal of 11865666 is 66656811.

It is a sphenic number, since it is the product of 3 distinct primes.

11865666 is an admirable 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, 988800 + ... + 988811.

It is an arithmetic number, because the mean of its divisors is an integer number (2966418).

Almost surely, 2^11865666 is an apocalyptic number.

11865666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11865666 is a wasteful number, since it uses less digits than its factorization.

11865666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977616.

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

The square root of 11865666 is about 3444.6576027234. The cubic root of 11865666 is about 228.0853404753.

The spelling of 11865666 in words is "eleven million, eight hundred sixty-five thousand, six hundred sixty-six".