68668 has 6 divisors (see below), whose sum is σ = 120176. Its totient is φ = 34332.

The previous prime is 68659. The next prime is 68669. The reversal of 68668 is 86686.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68669) 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 as a sum of consecutive naturals, namely, 8580 + ... + 8587.

2⁶⁸⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

68668 is a deficient number, since it is larger than the sum of its proper divisors (51508).

68668 is a wasteful number, since it uses less digits than its factorization.

68668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17171 (or 17169 counting only the distinct ones).

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

The square root of 68668 is about 262.0457975240. The cubic root of 68668 is about 40.9497699366.

The spelling of 68668 in words is "sixty-eight thousand, six hundred sixty-eight".