12166227258666 has 64 divisors (see below), whose sum is σ = 26389700902656. Its totient is φ = 3717015782400.

The previous prime is 12166227258659. The next prime is 12166227258671. The reversal of 12166227258666 is 66685272266121.

12166227258666 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-2 number, since 2×12166227258666² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8468386 + ... + 9800306.

It is an arithmetic number, because the mean of its divisors is an integer number (412339076604).

Almost surely, 2^{12166227258666} is an apocalyptic number.

12166227258666 is an abundant number, since it is smaller than the sum of its proper divisors (14223473643990).

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

12166227258666 is a wasteful number, since it uses less digits than its factorization.

12166227258666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332767.

The product of its digits is 34836480, while the sum is 60.

The spelling of 12166227258666 in words is "twelve trillion, one hundred sixty-six billion, two hundred twenty-seven million, two hundred fifty-eight thousand, six hundred sixty-six".