166875522881 has 4 divisors (see below), whose sum is σ = 166877452500. Its totient is φ = 166873593264.

The previous prime is 166875522871. The next prime is 166875522899. The reversal of 166875522881 is 188225578661.

166875522881 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 140246505025 + 26629017856 = 374495^2 + 163184^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166875522881 is a prime.

It is a super-2 number, since 2×166875522881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166875522881.

It is not an unprimeable number, because it can be changed into a prime (166875522851) 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, 828686 + ... + 1010183.

It is an arithmetic number, because the mean of its divisors is an integer number (41719363125).

Almost surely, 2^166875522881 is an apocalyptic number.

It is an amenable number.

166875522881 is a deficient number, since it is larger than the sum of its proper divisors (1929619).

166875522881 is an equidigital number, since it uses as much as digits as its factorization.

166875522881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929618.

The product of its digits is 12902400, while the sum is 59.

The spelling of 166875522881 in words is "one hundred sixty-six billion, eight hundred seventy-five million, five hundred twenty-two thousand, eight hundred eighty-one".