11664009 has 18 divisors (see below), whose sum is σ = 19599450. Its totient is φ = 6664896.

The previous prime is 11663983. The next prime is 11664017. The reversal of 11664009 is 90046611.

11664009 is a `hidden beast` number, since 1 + 16 + 640 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7683984 + 3980025 = 2772^2 + 1995^2 .

It is not a de Polignac number, because 11664009 - 2⁹ = 11663497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11664019) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 12784 + ... + 13665.

Almost surely, 2^11664009 is an apocalyptic number.

It is an amenable number.

11664009 is a deficient number, since it is larger than the sum of its proper divisors (7935441).

11664009 is a wasteful number, since it uses less digits than its factorization.

11664009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26469 (or 26459 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 11664009 is about 3415.2611905973. The cubic root of 11664009 is about 226.7858473107.

It can be divided in two parts, 1166400 and 9, that multiplied together give a square (10497600 = 3240²).

The spelling of 11664009 in words is "eleven million, six hundred sixty-four thousand, nine".