11116666871 has 4 divisors (see below), whose sum is σ = 11117201472. Its totient is φ = 11116132272.

The previous prime is 11116666853. The next prime is 11116666921. The reversal of 11116666871 is 17866661111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17866661111 = 13 ⋅1374358547.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11116666871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11116666271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234791 + ... + 278136.

It is an arithmetic number, because the mean of its divisors is an integer number (2779300368).

Almost surely, 2^11116666871 is an apocalyptic number.

11116666871 is a deficient number, since it is larger than the sum of its proper divisors (534601).

11116666871 is an equidigital number, since it uses as much as digits as its factorization.

11116666871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534600.

The product of its digits is 72576, while the sum is 44.

The spelling of 11116666871 in words is "eleven billion, one hundred sixteen million, six hundred sixty-six thousand, eight hundred seventy-one".