11915666 has 16 divisors (see below), whose sum is σ = 20926080. Its totient is φ = 4981920.

The previous prime is 11915663. The next prime is 11915671. The reversal of 11915666 is 66651911.

11915666 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 (11915663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9806 + ... + 10953.

It is an arithmetic number, because the mean of its divisors is an integer number (1307880).

Almost surely, 2^11915666 is an apocalyptic number.

11915666 is a deficient number, since it is larger than the sum of its proper divisors (9010414).

11915666 is a wasteful number, since it uses less digits than its factorization.

11915666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20809.

The product of its digits is 9720, while the sum is 35.

The square root of 11915666 is about 3451.9075885661. The cubic root of 11915666 is about 228.4052631227.

The spelling of 11915666 in words is "eleven million, nine hundred fifteen thousand, six hundred sixty-six".