166396085 has 12 divisors (see below), whose sum is σ = 212113668. Its totient is φ = 125285376.

The previous prime is 166396079. The next prime is 166396093. The reversal of 166396085 is 580693661.

It can be written as a sum of positive squares in 6 ways, for example, as 20421361 + 145974724 = 4519^2 + 12082^2 .

It is not a de Polignac number, because 166396085 - 2⁸ = 166395829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56132 + ... + 59021.

It is an arithmetic number, because the mean of its divisors is an integer number (17676139).

Almost surely, 2^166396085 is an apocalyptic number.

It is an amenable number.

166396085 is a deficient number, since it is larger than the sum of its proper divisors (45717583).

166396085 is a wasteful number, since it uses less digits than its factorization.

166396085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115192 (or 115175 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 166396085 is about 12899.4606476395. The cubic root of 166396085 is about 550.0232331783.

The spelling of 166396085 in words is "one hundred sixty-six million, three hundred ninety-six thousand, eighty-five".