"The fund, worth about $800bn (£483bn), owns 1% of the entire world's stocks, and is big enough to make every citizen a millionaire in the country's currency, the kroner."
Comma is the decimal separator in many countries (including Norway). ISO and several other standards bodies recommend space for digit grouping: 5 000 000.
To be fair, considering China and India are included, I think that's more than half the world population. China, India and the US make up more than 40% of the world population alone, apparently:
$860B USD = 7T KR / 5M people = 1.4M KR each