11668156723806 has 32 divisors (see below), whose sum is σ = 25999451739648. Its totient is φ = 3460575171840.

The previous prime is 11668156723799. The next prime is 11668156723819. The reversal of 11668156723806 is 60832765186611.

It is a happy number.

11668156723806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×11668156723806³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11668156723806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1880744275 + ... + 1880750478.

It is an arithmetic number, because the mean of its divisors is an integer number (812482866864).

Almost surely, 2^{11668156723806} is an apocalyptic number.

11668156723806 is an abundant number, since it is smaller than the sum of its proper divisors (14331295015842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11668156723806 is a wasteful number, since it uses less digits than its factorization.

11668156723806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3761494816.

The product of its (nonzero) digits is 17418240, while the sum is 60.

The spelling of 11668156723806 in words is "eleven trillion, six hundred sixty-eight billion, one hundred fifty-six million, seven hundred twenty-three thousand, eight hundred six".