2166044205 has 64 divisors (see below), whose sum is σ = 4123768320. Its totient is φ = 959963136.

The previous prime is 2166044143. The next prime is 2166044207. The reversal of 2166044205 is 5024406612.

It is not a de Polignac number, because 2166044205 - 2¹⁷ = 2165913133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166044207) 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, 62041 + ... + 90449.

It is an arithmetic number, because the mean of its divisors is an integer number (64433880).

Almost surely, 2^2166044205 is an apocalyptic number.

It is an amenable number.

2166044205 is a deficient number, since it is larger than the sum of its proper divisors (1957724115).

2166044205 is a wasteful number, since it uses less digits than its factorization.

2166044205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28470.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 2166044205 is about 46540.7800213963. The cubic root of 2166044205 is about 1293.8654175077.

The spelling of 2166044205 in words is "two billion, one hundred sixty-six million, forty-four thousand, two hundred five".