11668691 has 2 divisors, whose sum is σ = 11668692. Its totient is φ = 11668690.

The previous prime is 11668687. The next prime is 11668703. The reversal of 11668691 is 19686611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11668691 - 2² = 11668687 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11668661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5834345 + 5834346.

It is an arithmetic number, because the mean of its divisors is an integer number (5834346).

Almost surely, 2^11668691 is an apocalyptic number.

11668691 is a deficient number, since it is larger than the sum of its proper divisors (1).

11668691 is an equidigital number, since it uses as much as digits as its factorization.

11668691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 38.

The square root of 11668691 is about 3415.9465745237. The cubic root of 11668691 is about 226.8161876307.

The spelling of 11668691 in words is "eleven million, six hundred sixty-eight thousand, six hundred ninety-one".