216116166 has 48 divisors (see below), whose sum is σ = 515093040. Its totient is φ = 60238080.

The previous prime is 216116161. The next prime is 216116167. The reversal of 216116166 is 661611612.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216116161) 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, 3090 + ... + 21018.

It is an arithmetic number, because the mean of its divisors is an integer number (10731105).

Almost surely, 2^216116166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216116166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257546520).

216116166 is an abundant number, since it is smaller than the sum of its proper divisors (298976874).

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

216116166 is a wasteful number, since it uses less digits than its factorization.

216116166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17989 (or 17982 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 216116166 is about 14700.8899730595. The cubic root of 216116166 is about 600.1075418345.

Adding to 216116166 its reverse (661611612), we get a palindrome (877727778).

The spelling of 216116166 in words is "two hundred sixteen million, one hundred sixteen thousand, one hundred sixty-six".