11866686 has 32 divisors (see below), whose sum is σ = 25740288. Its totient is φ = 3625440.

The previous prime is 11866649. The next prime is 11866691. The reversal of 11866686 is 68666811.

11866686 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12571 + ... + 13481.

It is an arithmetic number, because the mean of its divisors is an integer number (804384).

Almost surely, 2^11866686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11866686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12870144).

11866686 is an abundant number, since it is smaller than the sum of its proper divisors (13873602).

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

11866686 is a wasteful number, since it uses less digits than its factorization.

11866686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096.

The product of its digits is 82944, while the sum is 42.

The square root of 11866686 is about 3444.8056548955. The cubic root of 11866686 is about 228.0918758686.

The spelling of 11866686 in words is "eleven million, eight hundred sixty-six thousand, six hundred eighty-six".