Number format in thousands on highcharts in wpdatatable plugin

You will need to set the lang.numericSymbols in the defaultOptions to null. By default they are set to ['k', 'M', 'G', 'T', 'P', 'E']

Highcharts.setOptions({
  lang: {
    numericSymbols: null 
  }
});

This is described in the documentation here: http://api.highcharts.com/highstock#lang.numericSymbols