68866571 has 2 divisors, whose sum is σ = 68866572. Its totient is φ = 68866570.

The previous prime is 68866559. The next prime is 68866613. The reversal of 68866571 is 17566886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68866571 - 2¹⁸ = 68604427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68866871) 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 as a sum of consecutive naturals, namely, 34433285 + 34433286.

It is an arithmetic number, because the mean of its divisors is an integer number (34433286).

Almost surely, 2^68866571 is an apocalyptic number.

68866571 is a deficient number, since it is larger than the sum of its proper divisors (1).

68866571 is an equidigital number, since it uses as much as digits as its factorization.

68866571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 47.

The square root of 68866571 is about 8298.5884944369. The cubic root of 68866571 is about 409.8920417720.

The spelling of 68866571 in words is "sixty-eight million, eight hundred sixty-six thousand, five hundred seventy-one".