2166641744 has 40 divisors (see below), whose sum is σ = 4432945440. Its totient is φ = 1023020928.

The previous prime is 2166641683. The next prime is 2166641777. The reversal of 2166641744 is 4471466612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85127 + ... + 107609.

It is an arithmetic number, because the mean of its divisors is an integer number (110823636).

Almost surely, 2^2166641744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2166641744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2216472720).

2166641744 is an abundant number, since it is smaller than the sum of its proper divisors (2266303696).

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

2166641744 is a wasteful number, since it uses less digits than its factorization.

2166641744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22827 (or 22821 counting only the distinct ones).

The product of its digits is 193536, while the sum is 41.

The square root of 2166641744 is about 46547.1990994088. The cubic root of 2166641744 is about 1293.9843846034.

The spelling of 2166641744 in words is "two billion, one hundred sixty-six million, six hundred forty-one thousand, seven hundred forty-four".