168666 has 8 divisors (see below), whose sum is σ = 337344. Its totient is φ = 56220.

The previous prime is 168643. The next prime is 168673. The reversal of 168666 is 666861.

168666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

168666 is an esthetic number in base 14, because in such base its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

168666 is an admirable number.

168666 is a modest number, since divided by 666 gives 168 as remainder.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14050 + ... + 14061.

It is an arithmetic number, because the mean of its divisors is an integer number (42168).

2¹⁶⁸⁶⁶⁶ is an apocalyptic number.

168666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168666 is a wasteful number, since it uses less digits than its factorization.

168666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28116.

The product of its digits is 10368, while the sum is 33.

The square root of 168666 is about 410.6896638582. The cubic root of 168666 is about 55.2513018127.

The spelling of 168666 in words is "one hundred sixty-eight thousand, six hundred sixty-six".