8166859 has 4 divisors (see below), whose sum is σ = 8177904. Its totient is φ = 8155816.

The previous prime is 8166853. The next prime is 8166887. The reversal of 8166859 is 9586618.

8166859 is digitally balanced in base 3, 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 is a cyclic number.

It is not a de Polignac number, because 8166859 - 2⁷ = 8166731 is a prime.

It is a super-3 number, since 3×8166859³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8166853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4327 + ... + 5920.

It is an arithmetic number, because the mean of its divisors is an integer number (2044476).

Almost surely, 2^8166859 is an apocalyptic number.

8166859 is a deficient number, since it is larger than the sum of its proper divisors (11045).

8166859 is a wasteful number, since it uses less digits than its factorization.

8166859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11044.

The product of its digits is 103680, while the sum is 43.

The square root of 8166859 is about 2857.7716843723. The cubic root of 8166859 is about 201.3809348167.

It can be divided in two parts, 8166 and 859, that added together give a square (9025 = 95²).

The spelling of 8166859 in words is "eight million, one hundred sixty-six thousand, eight hundred fifty-nine".