68666 has 16 divisors (see below), whose sum is σ = 117600. Its totient is φ = 29808.

The previous prime is 68659. The next prime is 68669. The reversal of 68666 is 66686.

It is a happy number.

68666 is a modest number, since divided by 666 gives 68 as remainder.

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 in 7 ways as a sum of consecutive naturals, for example, 425 + ... + 563.

It is an arithmetic number, because the mean of its divisors is an integer number (7350).

2⁶⁸⁶⁶⁶ is an apocalyptic number.

68666 is a deficient number, since it is larger than the sum of its proper divisors (48934).

68666 is a wasteful number, since it uses less digits than its factorization.

68666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173.

The product of its digits is 10368, while the sum is 32.

The square root of 68666 is about 262.0419813694. The cubic root of 68666 is about 40.9493723699.

The spelling of 68666 in words is "sixty-eight thousand, six hundred sixty-six".