11665586411 has 4 divisors (see below), whose sum is σ = 11698633752. Its totient is φ = 11632539072.

The previous prime is 11665586399. The next prime is 11665586417. The reversal of 11665586411 is 11468556611.

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 11665586411 - 2¹⁴ = 11665570027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11665586417) 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, 16523141 + ... + 16523846.

It is an arithmetic number, because the mean of its divisors is an integer number (2924658438).

Almost surely, 2^11665586411 is an apocalyptic number.

11665586411 is a deficient number, since it is larger than the sum of its proper divisors (33047341).

11665586411 is an equidigital number, since it uses as much as digits as its factorization.

11665586411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33047340.

The product of its digits is 172800, while the sum is 44.

The spelling of 11665586411 in words is "eleven billion, six hundred sixty-five million, five hundred eighty-six thousand, four hundred eleven".