2166701808 has 20 divisors (see below), whose sum is σ = 5597313128. Its totient is φ = 722233920.

The previous prime is 2166701807. The next prime is 2166701809. The reversal of 2166701808 is 8081076612.

It is an interprime number because it is at equal distance from previous prime (2166701807) and next prime (2166701809).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166701807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22569763 + ... + 22569858.

Almost surely, 2^2166701808 is an apocalyptic number.

It is an amenable number.

2166701808 is an abundant number, since it is smaller than the sum of its proper divisors (3430611320).

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

2166701808 is a wasteful number, since it uses less digits than its factorization.

2166701808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45139632 (or 45139626 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 2166701808 is about 46547.8442895050. The cubic root of 2166701808 is about 1293.9963418425.

The spelling of 2166701808 in words is "two billion, one hundred sixty-six million, seven hundred one thousand, eight hundred eight".