86668 has 12 divisors (see below), whose sum is σ = 155232. Its totient is φ = 42320.

The previous prime is 86629. The next prime is 86677.

It is a happy number.

86668 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×86668² = 15022684448, which contains 22 as substring.

It is an Ulam number.

Its product of digits (13824) is a multiple of the sum of its prime factors (512).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43 + ... + 418.

It is an arithmetic number, because the mean of its divisors is an integer number (12936).

2⁸⁶⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

86668 is a deficient number, since it is larger than the sum of its proper divisors (68564).

86668 is a wasteful number, since it uses less digits than its factorization.

86668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 510 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 86668 is about 294.3942934230. The cubic root of 86668 is about 44.2540400835.

The spelling of 86668 in words is "eighty-six thousand, six hundred sixty-eight".