11881866 has 32 divisors (see below), whose sum is σ = 24772608. Its totient is φ = 3795120.

The previous prime is 11881853. The next prime is 11881867. The reversal of 11881866 is 66818811.

11881866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (11881867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23371 + ... + 23873.

It is an arithmetic number, because the mean of its divisors is an integer number (774144).

Almost surely, 2^11881866 is an apocalyptic number.

11881866 is an abundant number, since it is smaller than the sum of its proper divisors (12890742).

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

11881866 is a wasteful number, since it uses less digits than its factorization.

11881866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666.

The product of its digits is 18432, while the sum is 39.

The square root of 11881866 is about 3447.0082680493. The cubic root of 11881866 is about 228.1890936689.

The spelling of 11881866 in words is "eleven million, eight hundred eighty-one thousand, eight hundred sixty-six".