68686 has 8 divisors (see below), whose sum is σ = 104904. Its totient is φ = 33720.

The previous prime is 68683. The next prime is 68687.

It is a happy number.

68686 is nontrivially palindromic in base 10.

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

68686 is an undulating number in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68683) by changing a digit.

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, 160 + ... + 403.

It is an arithmetic number, because the mean of its divisors is an integer number (13113).

2⁶⁸⁶⁸⁶ is an apocalyptic number.

68686 is a deficient number, since it is larger than the sum of its proper divisors (36218).

68686 is a wasteful number, since it uses less digits than its factorization.

68686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626.

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

The square root of 68686 is about 262.0801404151. The cubic root of 68686 is about 40.9533476898.

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

The spelling of 68686 in words is "sixty-eight thousand, six hundred eighty-six".