Only one thing is also impossible for God to do, suicide. Because energy can not be destroyed or created, if he is not the purest kind of energy then what?

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Anyhow, your mistake is searching randomly/sequentially, doesn't matter what method you use, 66 bit is very large, you should have at least consult an expert before spending money, or just do a simple calculation like this :

Your speed rate = 5 billion keys per second, how many seconds is 1 year = 31536000 * 5b/2^66 = 467 years to search 66 bit.  If you believe in "luck" and "chance", you should buy lottery tickets to try your luck.

Anyone trying to brute force #66, please stop and first calculate the profit and cost.