166866837017 has 4 divisors (see below), whose sum is σ = 168397725540. Its totient is φ = 165335948496.

The previous prime is 166866837013. The next prime is 166866837023. The reversal of 166866837017 is 710738668661.

166866837017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 148393677961 + 18473159056 = 385219^2 + 135916^2 .

It is a cyclic number.

It is not a de Polignac number, because 166866837017 - 2² = 166866837013 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166866837013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765444098 + ... + 765444315.

It is an arithmetic number, because the mean of its divisors is an integer number (42099431385).

Almost surely, 2^166866837017 is an apocalyptic number.

It is an amenable number.

166866837017 is a deficient number, since it is larger than the sum of its proper divisors (1530888523).

166866837017 is a wasteful number, since it uses less digits than its factorization.

166866837017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530888522.

The product of its (nonzero) digits is 12192768, while the sum is 59.

The spelling of 166866837017 in words is "one hundred sixty-six billion, eight hundred sixty-six million, eight hundred thirty-seven thousand, seventeen".