67098665617 has 2 divisors, whose sum is σ = 67098665618. Its totient is φ = 67098665616.

The previous prime is 67098665597. The next prime is 67098665651. The reversal of 67098665617 is 71656689076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64310931216 + 2787734401 = 253596^2 + 52799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67098665617 is a prime.

It is not a weakly prime, because it can be changed into another prime (67098665717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33549332808 + 33549332809.

It is an arithmetic number, because the mean of its divisors is an integer number (33549332809).

Almost surely, 2^67098665617 is an apocalyptic number.

It is an amenable number.

67098665617 is a deficient number, since it is larger than the sum of its proper divisors (1).

67098665617 is an equidigital number, since it uses as much as digits as its factorization.

67098665617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 67098665617 in words is "sixty-seven billion, ninety-eight million, six hundred sixty-five thousand, six hundred seventeen".