2166768072 has 96 divisors (see below), whose sum is σ = 6714489600. Its totient is φ = 618354432.

The previous prime is 2166768067. The next prime is 2166768119. The reversal of 2166768072 is 2708676612.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 550929 + ... + 554847.

It is an arithmetic number, because the mean of its divisors is an integer number (69942600).

Almost surely, 2^2166768072 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 2166768072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3357244800).

2166768072 is an abundant number, since it is smaller than the sum of its proper divisors (4547721528).

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

2166768072 is a wasteful number, since it uses less digits than its factorization.

2166768072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5035 (or 5028 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 2166768072 is about 46548.5560678309. The cubic root of 2166768072 is about 1294.0095330900.

The spelling of 2166768072 in words is "two billion, one hundred sixty-six million, seven hundred sixty-eight thousand, seventy-two".