168606861 has 16 divisors (see below), whose sum is σ = 233748480. Its totient is φ = 107987760.

The previous prime is 168606847. The next prime is 168606869.

168606861 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 168606861 - 2⁹ = 168606349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168606869) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6406 + ... + 19448.

It is an arithmetic number, because the mean of its divisors is an integer number (14609280).

Almost surely, 2^168606861 is an apocalyptic number.

It is an amenable number.

168606861 is a deficient number, since it is larger than the sum of its proper divisors (65141619).

168606861 is a wasteful number, since it uses less digits than its factorization.

168606861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13216.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 168606861 is about 12984.8704652761. The cubic root of 168606861 is about 552.4484350912.

The spelling of 168606861 in words is "one hundred sixty-eight million, six hundred six thousand, eight hundred sixty-one".