You can count income in many ways and the data here is probably fresher than what I could find in a half-minute search. USA is just right after the Luxembourg and the number is still just 62% of the 66k mentioned above.
1. I can bet an average household in the US is > 2 people (google says 3.13). The threshold in question is for personal income.
2. The context of the whole discussion is global, so comparisons made from a perspective of a citizen of one of the richest countries in the world don't really fly.
The highest median income of all countries (Luxembourg) is about half that, give or take. The median income on Earth is somewhere around 5k, I think.