I agree the DOE number is strangely large. But your own link says there are over 7.2 million data centers worldwide. Then it says the USA has the most of any country, but only has 2670. There is clearly some inconsistency here, probably inconsistency of definition.
I think the original idea is silly, but that DOE number seems very wrong. E.g. this link says 2500 (https://datacentremagazine.com/top10/top-10-countries-most-data-centres), and in general most sources I’ve seen suggest O(10^5).
I agree the DOE number is strangely large. But your own link says there are over 7.2 million data centers worldwide. Then it says the USA has the most of any country, but only has 2670. There is clearly some inconsistency here, probably inconsistency of definition.