166859912 has 12 divisors (see below), whose sum is σ = 312930855. Its totient is φ = 83411688.

The previous prime is 166859911. The next prime is 166859941. The reversal of 166859912 is 219958661.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 83429956 + 83429956 = 9134^2 + 9134^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=9134.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166859911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 34253 + ... + 38819.

Almost surely, 2^166859912 is an apocalyptic number.

It is an amenable number.

166859912 is a deficient number, since it is larger than the sum of its proper divisors (146070943).

166859912 is an frugal number, since it uses more digits than its factorization.

166859912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9140 (or 4569 counting only the distinct ones).

The product of its digits is 233280, while the sum is 47.

The square root of 166859912 is about 12917.4266787159. The cubic root of 166859912 is about 550.5338200084.

The spelling of 166859912 in words is "one hundred sixty-six million, eight hundred fifty-nine thousand, nine hundred twelve".