166775890842 has 32 divisors (see below), whose sum is σ = 404305191360. Its totient is φ = 50538148560.

The previous prime is 166775890837. The next prime is 166775890859. The reversal of 166775890842 is 248098577661.

166775890842 is a `hidden beast` number, since 1 + 6 + 6 + 7 + 7 + 589 + 0 + 8 + 42 = 666.

166775890842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166775890842² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166775890842.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 140383153 + ... + 140384340.

It is an arithmetic number, because the mean of its divisors is an integer number (12634537230).

Almost surely, 2^166775890842 is an apocalyptic number.

166775890842 is an abundant number, since it is smaller than the sum of its proper divisors (237529300518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166775890842 is a wasteful number, since it uses less digits than its factorization.

166775890842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280767515 (or 280767509 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 63.

The spelling of 166775890842 in words is "one hundred sixty-six billion, seven hundred seventy-five million, eight hundred ninety thousand, eight hundred forty-two".