166871859 has 16 divisors (see below), whose sum is σ = 277397760. Its totient is φ = 86686560.

The previous prime is 166871849. The next prime is 166871867. The reversal of 166871859 is 958178661.

166871859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166871859 - 2⁴ = 166871843 is a prime.

It is a super-2 number, since 2×166871859² = 55692434652231762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166871819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360964 + ... + 361425.

It is an arithmetic number, because the mean of its divisors is an integer number (17337360).

Almost surely, 2^166871859 is an apocalyptic number.

166871859 is a deficient number, since it is larger than the sum of its proper divisors (110525901).

166871859 is a wasteful number, since it uses less digits than its factorization.

166871859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722410.

The product of its digits is 725760, while the sum is 51.

The square root of 166871859 is about 12917.8891077451. The cubic root of 166871859 is about 550.5469589153.

The spelling of 166871859 in words is "one hundred sixty-six million, eight hundred seventy-one thousand, eight hundred fifty-nine".