11766866711 has 4 divisors (see below), whose sum is σ = 11770982424. Its totient is φ = 11762751000.

The previous prime is 11766866681. The next prime is 11766866729.

It is a happy number.

11766866711 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11766866711 - 2²² = 11762672407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11766866711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11766866311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053565 + ... + 2059286.

It is an arithmetic number, because the mean of its divisors is an integer number (2942745606).

Almost surely, 2^11766866711 is an apocalyptic number.

11766866711 is a deficient number, since it is larger than the sum of its proper divisors (4115713).

11766866711 is an equidigital number, since it uses as much as digits as its factorization.

11766866711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4115712.

The product of its digits is 508032, while the sum is 50.

The spelling of 11766866711 in words is "eleven billion, seven hundred sixty-six million, eight hundred sixty-six thousand, seven hundred eleven".