11669686851 has 4 divisors (see below), whose sum is σ = 15559582472. Its totient is φ = 7779791232.

The previous prime is 11669686813. The next prime is 11669686883. The reversal of 11669686851 is 15868696611.

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

It is not a de Polignac number, because 11669686851 - 2⁷ = 11669686723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11669686791 and 11669686800.

It is not an unprimeable number, because it can be changed into a prime (11669688851) 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, 1944947806 + ... + 1944947811.

It is an arithmetic number, because the mean of its divisors is an integer number (3889895618).

Almost surely, 2^11669686851 is an apocalyptic number.

11669686851 is a deficient number, since it is larger than the sum of its proper divisors (3889895621).

11669686851 is an equidigital number, since it uses as much as digits as its factorization.

11669686851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3889895620.

The product of its digits is 3732480, while the sum is 57.

The spelling of 11669686851 in words is "eleven billion, six hundred sixty-nine million, six hundred eighty-six thousand, eight hundred fifty-one".