68666017 has 16 divisors (see below), whose sum is σ = 83054592. Its totient is φ = 55495440.

The previous prime is 68665999. The next prime is 68666027. The reversal of 68666017 is 71066686.

68666017 is nontrivially palindromic in base 3.

It is not a de Polignac number, because 68666017 - 2⁷ = 68665889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68666027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8428 + ... + 14434.

It is an arithmetic number, because the mean of its divisors is an integer number (5190912).

Almost surely, 2^68666017 is an apocalyptic number.

It is an amenable number.

68666017 is a deficient number, since it is larger than the sum of its proper divisors (14388575).

68666017 is a wasteful number, since it uses less digits than its factorization.

68666017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6108.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 68666017 is about 8286.4960628724. The cubic root of 68666017 is about 409.4937574926.

The spelling of 68666017 in words is "sixty-eight million, six hundred sixty-six thousand, seventeen".