166886361 has 12 divisors (see below), whose sum is σ = 248834560. Its totient is φ = 107668440.

The previous prime is 166886351. The next prime is 166886393. The reversal of 166886361 is 163688661.

166886361 is a `hidden beast` number, since 1 + 6 + 6 + 8 + 8 + 636 + 1 = 666.

It is not a de Polignac number, because 166886361 - 2¹⁰ = 166885337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166886341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 298801 + ... + 299358.

Almost surely, 2^166886361 is an apocalyptic number.

It is an amenable number.

166886361 is a deficient number, since it is larger than the sum of its proper divisors (81948199).

166886361 is a wasteful number, since it uses less digits than its factorization.

166886361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598196 (or 598193 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 166886361 is about 12918.4504101692. The cubic root of 166886361 is about 550.5629068824.

The spelling of 166886361 in words is "one hundred sixty-six million, eight hundred eighty-six thousand, three hundred sixty-one".