2171166166217 has 8 divisors (see below), whose sum is σ = 2184391427040. Its totient is φ = 2157953081760.

The previous prime is 2171166166187. The next prime is 2171166166219. The reversal of 2171166166217 is 7126616611712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2171166166217 - 2¹⁰ = 2171166165193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2171166166219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2686259 + ... + 3399752.

It is an arithmetic number, because the mean of its divisors is an integer number (273048928380).

Almost surely, 2^{2171166166217} is an apocalyptic number.

It is an amenable number.

2171166166217 is a deficient number, since it is larger than the sum of its proper divisors (13225260823).

2171166166217 is a wasteful number, since it uses less digits than its factorization.

2171166166217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6088183.

The product of its digits is 254016, while the sum is 47.

The spelling of 2171166166217 in words is "two trillion, one hundred seventy-one billion, one hundred sixty-six million, one hundred sixty-six thousand, two hundred seventeen".