86686 has 8 divisors (see below), whose sum is σ = 131760. Its totient is φ = 42768.

The previous prime is 86677. The next prime is 86689. The reversal of 86686 is 68668.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86689) by changing a digit.

86686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66 + ... + 421.

It is an arithmetic number, because the mean of its divisors is an integer number (16470).

2⁸⁶⁶⁸⁶ is an apocalyptic number.

86686 is a deficient number, since it is larger than the sum of its proper divisors (45074).

86686 is a wasteful number, since it uses less digits than its factorization.

86686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578.

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

The square root of 86686 is about 294.4248630805. The cubic root of 86686 is about 44.2571035656.

It can be divided in two parts, 86 and 686, that multiplied together give a triangular number (58996 = T₃₄₃).

The spelling of 86686 in words is "eighty-six thousand, six hundred eighty-six".