2166799808 has 28 divisors (see below), whose sum is σ = 4438448832. Its totient is φ = 1048450560.

The previous prime is 2166799769. The next prime is 2166799819. The reversal of 2166799808 is 8089976612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544085 + ... + 548052.

Almost surely, 2^2166799808 is an apocalyptic number.

It is an amenable number.

2166799808 is an abundant number, since it is smaller than the sum of its proper divisors (2271649024).

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

2166799808 is a wasteful number, since it uses less digits than its factorization.

2166799808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092180 (or 1092170 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 56.

The square root of 2166799808 is about 46548.8969579302. The cubic root of 2166799808 is about 1294.0158507152.

The spelling of 2166799808 in words is "two billion, one hundred sixty-six million, seven hundred ninety-nine thousand, eight hundred eight".