2133666161 has 16 divisors (see below), whose sum is σ = 2516372160. Its totient is φ = 1787935680.

The previous prime is 2133666151. The next prime is 2133666169. The reversal of 2133666161 is 1616663312.

It is a cyclic number.

It is not a de Polignac number, because 2133666161 - 2³⁰ = 1059924337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2133666169) 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, 130226 + ... + 145691.

It is an arithmetic number, because the mean of its divisors is an integer number (157273260).

Almost surely, 2^2133666161 is an apocalyptic number.

It is an amenable number.

2133666161 is a deficient number, since it is larger than the sum of its proper divisors (382705999).

2133666161 is a wasteful number, since it uses less digits than its factorization.

2133666161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275984.

The product of its digits is 23328, while the sum is 35.

The square root of 2133666161 is about 46191.6243598339. The cubic root of 2133666161 is about 1287.3861221553.

The spelling of 2133666161 in words is "two billion, one hundred thirty-three million, six hundred sixty-six thousand, one hundred sixty-one".