16166565105111 has 24 divisors (see below), whose sum is σ = 23563220668416. Its totient is φ = 10680516638160.

The previous prime is 16166565105109. The next prime is 16166565105137. The reversal of 16166565105111 is 11150156566161.

16166565105111 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 65 + 65 + 10 + 511 + 1 = 666.

It is not a de Polignac number, because 16166565105111 - 2¹ = 16166565105109 is a prime.

It is a super-2 number, since 2×16166565105111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16166565105011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17427435 + ... + 18331628.

It is an arithmetic number, because the mean of its divisors is an integer number (981800861184).

Almost surely, 2^{16166565105111} is an apocalyptic number.

16166565105111 is a deficient number, since it is larger than the sum of its proper divisors (7396655563305).

16166565105111 is a wasteful number, since it uses less digits than its factorization.

16166565105111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35759523 (or 35759520 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 45.

The spelling of 16166565105111 in words is "sixteen trillion, one hundred sixty-six billion, five hundred sixty-five million, one hundred five thousand, one hundred eleven".