8166650818172 has 192 divisors, whose sum is σ = 18384782438400. Its totient is φ = 3146343782400.

The previous prime is 8166650818159. The next prime is 8166650818181. The reversal of 8166650818172 is 2718180566618.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3427044893 + ... + 3427047275.

It is an arithmetic number, because the mean of its divisors is an integer number (95754075200).

Almost surely, 2^{8166650818172} 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 8166650818172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9192391219200).

8166650818172 is an abundant number, since it is smaller than the sum of its proper divisors (10218131620228).

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

8166650818172 is a wasteful number, since it uses less digits than its factorization.

8166650818172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4857 (or 4841 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 59.

The spelling of 8166650818172 in words is "eight trillion, one hundred sixty-six billion, six hundred fifty million, eight hundred eighteen thousand, one hundred seventy-two".