2666173161 has 16 divisors (see below), whose sum is σ = 3640809920. Its totient is φ = 1734566400.

The previous prime is 2666173127. The next prime is 2666173171. The reversal of 2666173161 is 1613716662.

It is not a de Polignac number, because 2666173161 - 2¹¹ = 2666171113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2666173171) 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, 146325 + ... + 163533.

It is an arithmetic number, because the mean of its divisors is an integer number (227550620).

Almost surely, 2^2666173161 is an apocalyptic number.

It is an amenable number.

2666173161 is a deficient number, since it is larger than the sum of its proper divisors (974636759).

2666173161 is a wasteful number, since it uses less digits than its factorization.

2666173161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18456.

The product of its digits is 54432, while the sum is 39.

The square root of 2666173161 is about 51634.9993802653. Note that the first 3 decimals coincide. The cubic root of 2666173161 is about 1386.6369989942.

The spelling of 2666173161 in words is "two billion, six hundred sixty-six million, one hundred seventy-three thousand, one hundred sixty-one".