2166566200 has 96 divisors (see below), whose sum is σ = 5323878000. Its totient is φ = 817689600.

The previous prime is 2166566189. The next prime is 2166566201. The reversal of 2166566200 is 26656612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166566201) 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, 1066786 + ... + 1068814.

Almost surely, 2^2166566200 is an apocalyptic number.

2166566200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2166566200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2661939000).

2166566200 is an abundant number, since it is smaller than the sum of its proper divisors (3157311800).

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

2166566200 is a wasteful number, since it uses less digits than its factorization.

2166566200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345 (or 2336 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 2166566200 is about 46546.3876149374. The cubic root of 2166566200 is about 1293.9693453700.

The spelling of 2166566200 in words is "two billion, one hundred sixty-six million, five hundred sixty-six thousand, two hundred".