11565966 has 16 divisors (see below), whose sum is σ = 23511888. Its totient is φ = 3792000.

The previous prime is 11565959. The next prime is 11565979. The reversal of 11565966 is 66956511.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15435 + ... + 16166.

It is an arithmetic number, because the mean of its divisors is an integer number (1469493).

Almost surely, 2^11565966 is an apocalyptic number.

11565966 is an abundant number, since it is smaller than the sum of its proper divisors (11945922).

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

11565966 is a wasteful number, since it uses less digits than its factorization.

11565966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31667.

The product of its digits is 48600, while the sum is 39.

The square root of 11565966 is about 3400.8772397721. The cubic root of 11565966 is about 226.1486348326.

The spelling of 11565966 in words is "eleven million, five hundred sixty-five thousand, nine hundred sixty-six".