two billion nine hundred ninety nine million nine hundred ninety nine thousand three hundred zero seven Pronunciation in english(IPA) :
tuː ˈbɪljən nʌɪn ˈhʌndrəd ˈnʌɪnti nʌɪn ˈmɪljən nʌɪn ˈhʌndrəd ˈnʌɪnti nʌɪn ˈθaʊz(ə)nd θriː ˈhʌndrəd ˈzɪərəʊ ˈsɛv(ə)n