11665616111 has 8 divisors (see below), whose sum is σ = 11805057840. Its totient is φ = 11527002432.

The previous prime is 11665616047. The next prime is 11665616119. The reversal of 11665616111 is 11161656611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11665616111 - 2⁶ = 11665616047 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 (11665616119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178646 + ... + 235043.

It is an arithmetic number, because the mean of its divisors is an integer number (1475632230).

Almost surely, 2^11665616111 is an apocalyptic number.

11665616111 is a deficient number, since it is larger than the sum of its proper divisors (139441729).

11665616111 is a wasteful number, since it uses less digits than its factorization.

11665616111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414025.

The product of its digits is 6480, while the sum is 35.

The spelling of 11665616111 in words is "eleven billion, six hundred sixty-five million, six hundred sixteen thousand, one hundred eleven".