67716689 has 2 divisors, whose sum is σ = 67716690. Its totient is φ = 67716688.

The previous prime is 67716659. The next prime is 67716721. The reversal of 67716689 is 98661776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63473089 + 4243600 = 7967^2 + 2060^2 .

It is a cyclic number.

It is not a de Polignac number, because 67716689 - 2⁸ = 67716433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67716659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33858344 + 33858345.

It is an arithmetic number, because the mean of its divisors is an integer number (33858345).

Almost surely, 2^67716689 is an apocalyptic number.

It is an amenable number.

67716689 is a deficient number, since it is larger than the sum of its proper divisors (1).

67716689 is an equidigital number, since it uses as much as digits as its factorization.

67716689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 50.

The square root of 67716689 is about 8229.0150686458. The cubic root of 67716689 is about 407.5978692752.

The spelling of 67716689 in words is "sixty-seven million, seven hundred sixteen thousand, six hundred eighty-nine".