68660617 has 2 divisors, whose sum is σ = 68660618. Its totient is φ = 68660616.

The previous prime is 68660597. The next prime is 68660677. The reversal of 68660617 is 71606686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66928761 + 1731856 = 8181^2 + 1316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68660617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68660617.

It is not a weakly prime, because it can be changed into another prime (68660677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34330308 + 34330309.

It is an arithmetic number, because the mean of its divisors is an integer number (34330309).

Almost surely, 2^68660617 is an apocalyptic number.

It is an amenable number.

68660617 is a deficient number, since it is larger than the sum of its proper divisors (1).

68660617 is an equidigital number, since it uses as much as digits as its factorization.

68660617 is an odious number, because the sum of its binary digits is odd.

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

The square root of 68660617 is about 8286.1702251402. The cubic root of 68660617 is about 409.4830228073.

The spelling of 68660617 in words is "sixty-eight million, six hundred sixty thousand, six hundred seventeen".