11111706691 has 2 divisors, whose sum is σ = 11111706692. Its totient is φ = 11111706690.

The previous prime is 11111706647. The next prime is 11111706707. The reversal of 11111706691 is 19660711111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11111706691 - 2⁷ = 11111706563 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111706601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555853345 + 5555853346.

It is an arithmetic number, because the mean of its divisors is an integer number (5555853346).

Almost surely, 2^11111706691 is an apocalyptic number.

11111706691 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111706691 is an equidigital number, since it uses as much as digits as its factorization.

11111706691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 34.

The spelling of 11111706691 in words is "eleven billion, one hundred eleven million, seven hundred six thousand, six hundred ninety-one".