I think Jews would agree on that number. There weren't even 15 mil jews in Europe to be killed.
A country of 62 million being taken over by less than 600k jews is a stretch I think.
And, if your race of whatever you are was reduced in number by 1/3 quite a bit less then 100 years in the past you'd find it significant.
There is however a distortion to only include the Jews.