11665026013 has 4 divisors (see below), whose sum is σ = 11671548220. Its totient is φ = 11658503808.

The previous prime is 11665025969. The next prime is 11665026049. The reversal of 11665026013 is 31062056611.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10638272164 + 1026753849 = 103142^2 + 32043^2 .

It is a cyclic number.

It is not a de Polignac number, because 11665026013 - 2⁹ = 11665025501 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 (11665026083) 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, 3258420 + ... + 3261997.

It is an arithmetic number, because the mean of its divisors is an integer number (2917887055).

Almost surely, 2^11665026013 is an apocalyptic number.

It is an amenable number.

11665026013 is a deficient number, since it is larger than the sum of its proper divisors (6522207).

11665026013 is an equidigital number, since it uses as much as digits as its factorization.

11665026013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6522206.

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 11665026013 in words is "eleven billion, six hundred sixty-five million, twenty-six thousand, thirteen".