2005666194 has 32 divisors (see below), whose sum is σ = 4783703040. Its totient is φ = 548132112.

The previous prime is 2005666193. The next prime is 2005666207. The reversal of 2005666194 is 4916665002.

It is a super-3 number, since 3×2005666194³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2005666193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1037164 + ... + 1039095.

It is an arithmetic number, because the mean of its divisors is an integer number (149490720).

Almost surely, 2^2005666194 is an apocalyptic number.

2005666194 is an abundant number, since it is smaller than the sum of its proper divisors (2778036846).

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

2005666194 is a wasteful number, since it uses less digits than its factorization.

2005666194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076294.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 2005666194 is about 44784.6647190754. The cubic root of 2005666194 is about 1261.1097542113.

The spelling of 2005666194 in words is "two billion, five million, six hundred sixty-six thousand, one hundred ninety-four".