166807320889 has 16 divisors (see below), whose sum is σ = 190414877184. Its totient is φ = 144740995200.

The previous prime is 166807320887. The next prime is 166807320913. The reversal of 166807320889 is 988023708661.

It is a cyclic number.

It is not a de Polignac number, because 166807320889 - 2¹ = 166807320887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166807320887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3325594 + ... + 3375379.

It is an arithmetic number, because the mean of its divisors is an integer number (11900929824).

Almost surely, 2^166807320889 is an apocalyptic number.

It is an amenable number.

166807320889 is a deficient number, since it is larger than the sum of its proper divisors (23607556295).

166807320889 is a wasteful number, since it uses less digits than its factorization.

166807320889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6701088.

The product of its (nonzero) digits is 6967296, while the sum is 58.

The spelling of 166807320889 in words is "one hundred sixty-six billion, eight hundred seven million, three hundred twenty thousand, eight hundred eighty-nine".