11688665 has 8 divisors (see below), whose sum is σ = 14325120. Its totient is φ = 9151792.

The previous prime is 11688631. The next prime is 11688671. The reversal of 11688665 is 56688611.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11688665 - 2⁸ = 11688409 is a prime.

It is a Curzon 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, 24635 + ... + 25104.

It is an arithmetic number, because the mean of its divisors is an integer number (1790640).

Almost surely, 2^11688665 is an apocalyptic number.

It is an amenable number.

11688665 is a deficient number, since it is larger than the sum of its proper divisors (2636455).

11688665 is an equidigital number, since it uses as much as digits as its factorization.

11688665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49791.

The product of its digits is 69120, while the sum is 41.

The square root of 11688665 is about 3418.8689650234. The cubic root of 11688665 is about 226.9455321586.

The spelling of 11688665 in words is "eleven million, six hundred eighty-eight thousand, six hundred sixty-five".