11999966 has 16 divisors (see below), whose sum is σ = 19729008. Its totient is φ = 5428800.

The previous prime is 11999941. The next prime is 11999987. The reversal of 11999966 is 66999911.

It is a Curzon number.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3956 + ... + 6296.

It is an arithmetic number, because the mean of its divisors is an integer number (1233063).

Almost surely, 2^11999966 is an apocalyptic number.

11999966 is a deficient number, since it is larger than the sum of its proper divisors (7729042).

11999966 is a wasteful number, since it uses less digits than its factorization.

11999966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2587.

The product of its digits is 236196, while the sum is 50.

The square root of 11999966 is about 3464.0967076570. The cubic root of 11999966 is about 228.9426322867.

Subtracting 11999966 from its reverse (66999911), we obtain a palindrome (54999945).

The spelling of 11999966 in words is "eleven million, nine hundred ninety-nine thousand, nine hundred sixty-six".