2166989376 has 112 divisors (see below), whose sum is σ = 5939137728. Its totient is φ = 696883200.

The previous prime is 2166989351. The next prime is 2166989381. The reversal of 2166989376 is 6739896612.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 618991 + ... + 622481.

Almost surely, 2^2166989376 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 2166989376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2969568864).

2166989376 is an abundant number, since it is smaller than the sum of its proper divisors (3772148352).

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

2166989376 is a wasteful number, since it uses less digits than its factorization.

2166989376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620 (or 3610 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 57.

The square root of 2166989376 is about 46550.9331378008. The cubic root of 2166989376 is about 1294.0535863723.

The spelling of 2166989376 in words is "two billion, one hundred sixty-six million, nine hundred eighty-nine thousand, three hundred seventy-six".