166846535855 has 4 divisors (see below), whose sum is σ = 200215843032. Its totient is φ = 133477228680.

The previous prime is 166846535831. The next prime is 166846535857. The reversal of 166846535855 is 558535648661.

It is a happy number.

166846535855 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, and also an emirpimes, since its reverse is a distinct semiprime: 558535648661 = 55921 ⋅9987941.

It is not a de Polignac number, because 166846535855 - 2³² = 162551568559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166846535857) 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, 16684653581 + ... + 16684653590.

It is an arithmetic number, because the mean of its divisors is an integer number (50053960758).

Almost surely, 2^166846535855 is an apocalyptic number.

166846535855 is a deficient number, since it is larger than the sum of its proper divisors (33369307177).

166846535855 is an equidigital number, since it uses as much as digits as its factorization.

166846535855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33369307176.

The product of its digits is 103680000, while the sum is 62.

The spelling of 166846535855 in words is "one hundred sixty-six billion, eight hundred forty-six million, five hundred thirty-five thousand, eight hundred fifty-five".