2166833709 has 12 divisors (see below), whose sum is σ = 3130550176. Its totient is φ = 1444242312.

The previous prime is 2166833681. The next prime is 2166833771. The reversal of 2166833709 is 9073386612.

2166833709 is a `hidden beast` number, since 216 + 68 + 3 + 370 + 9 = 666.

It is not a de Polignac number, because 2166833709 - 2⁵ = 2166833677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166833509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22392 + ... + 69534.

Almost surely, 2^2166833709 is an apocalyptic number.

It is an amenable number.

2166833709 is a deficient number, since it is larger than the sum of its proper divisors (963716467).

2166833709 is a wasteful number, since it uses less digits than its factorization.

2166833709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52256 (or 52253 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 2166833709 is about 46549.2611004729. The cubic root of 2166833709 is about 1294.0225992548.

The spelling of 2166833709 in words is "two billion, one hundred sixty-six million, eight hundred thirty-three thousand, seven hundred nine".