2116161366 has 128 divisors (see below), whose sum is σ = 5005670400. Its totient is φ = 589628160.

The previous prime is 2116161361. The next prime is 2116161367. The reversal of 2116161366 is 6631616112.

2116161366 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

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 (2116161361) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7477461 + ... + 7477743.

It is an arithmetic number, because the mean of its divisors is an integer number (39106800).

Almost surely, 2^2116161366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2116161366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2502835200).

2116161366 is an abundant number, since it is smaller than the sum of its proper divisors (2889509034).

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

2116161366 is a wasteful number, since it uses less digits than its factorization.

2116161366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474.

The product of its digits is 7776, while the sum is 33.

The square root of 2116161366 is about 46001.7539448226. The cubic root of 2116161366 is about 1283.8558385232.

Adding to 2116161366 its reverse (6631616112), we get a palindrome (8747777478).

The spelling of 2116161366 in words is "two billion, one hundred sixteen million, one hundred sixty-one thousand, three hundred sixty-six".