two billion nine hundred ninety nine million nine hundred ninety eight thousand nine hundred forty seven Pronunciation in english(IPA) :
tuː ˈbɪljən nʌɪn ˈhʌndrəd ˈnʌɪnti nʌɪn ˈmɪljən nʌɪn ˈhʌndrəd ˈnʌɪnti eɪt ˈθaʊz(ə)nd nʌɪn ˈhʌndrəd ˈfɔːti ˈsɛv(ə)n