1666223064112 has 80 divisors (see below), whose sum is σ = 3424108343040. Its totient is φ = 784110249216.

The previous prime is 1666223064071. The next prime is 1666223064167. The reversal of 1666223064112 is 2114603226661.

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, 9952843 + ... + 10118869.

It is an arithmetic number, because the mean of its divisors is an integer number (42801354288).

Almost surely, 2^{1666223064112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666223064112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1712054171520).

1666223064112 is an abundant number, since it is smaller than the sum of its proper divisors (1757885278928).

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

1666223064112 is a wasteful number, since it uses less digits than its factorization.

1666223064112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166610 (or 166604 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 1666223064112 in words is "one trillion, six hundred sixty-six billion, two hundred twenty-three million, sixty-four thousand, one hundred twelve".