11668816 has 10 divisors (see below), whose sum is σ = 22608362. Its totient is φ = 5834400.

The previous prime is 11668807. The next prime is 11668819. The reversal of 11668816 is 61886611.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11022400 + 646416 = 3320^2 + 804^2 .

It is a super-2 number, since 2×11668816² = 272322533683712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11668819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364635 + ... + 364666.

Almost surely, 2^11668816 is an apocalyptic number.

11668816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11668816 is a deficient number, since it is larger than the sum of its proper divisors (10939546).

11668816 is an equidigital number, since it uses as much as digits as its factorization.

11668816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729309 (or 729303 counting only the distinct ones).

The product of its digits is 13824, while the sum is 37.

The square root of 11668816 is about 3415.9648710138. The cubic root of 11668816 is about 226.8169975451.

The spelling of 11668816 in words is "eleven million, six hundred sixty-eight thousand, eight hundred sixteen".