I'm not sure that's right. It's 60PB [1], not 6PB. According to
https://cloud.google.com/storage/pricing Google's cheapest (?) non-redundant archive storage seems to be USD $0.0012/GB/month. 60 PB = 60e6 GB, so 1 year would cost 12
60e6.0012 = 864e3 = USD $864 thousand. That's not counting the cost of getting the data in or getting any of it out to use.
[1] https://news.ycombinator.com/item?id=23485594