Ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine.

Eight million, nine hundred and ninety-nine thousand, nine hundred and ninety-eight in numerals is: 8,999,998

If you're counting down, then the next integer (whole number) is "a hundred million nine hundred ninety-nine thousand nine hundred ninety-eight". If you're counting up, then the next integer is "two hundred million".

Nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine

Long billion (=1012): Nine billion, nine hundred and ninety nine thousand million, nine hundred and ninety nine million, nine hundred and ninety nine thousand, nine hundred and ninety nine. Alternatively: Nine billion, nine hundred and ninety nine milliard, nine hundred and ninety nine million, nine hundred and ninety nine thousand, nine hundred and ninety nine. Short billion (=109): Nine trillion, nine hundred and ninety nine billion, nine hundred and ninety nine million, nine hundred and ninety nine thousand, nine hundred and ninety nine.

The following number would be 10,000,000, or 10 million.

1,999,998

It is seventeen million nine hundred thousand eight hundred ninety eight and ninety six hundredths.

Three hundred thirty six million two hundred ninety thousand six hundred ninety nine.

Ninety-four million, five hundred thousand

One trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-eight.

1,590,000

One trillion one million is the next whole number after one trilion nine hundred ninety nine thousand and ninety nine.

The largest 9 digit number is 999,999,999 (nine hundred and ninety nine million, nine hundred and ninety nine thousand, nine hundred and ninety nine).

One quadrillion, ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-eight.

94,862,602

9,999,999 = "nine million, nine hundred ninety-nine thousand, nine hundred ninety nine".

9,999,999; nine million, nine hundred ninety nine thousand, nine hundred ninety nine

One billion, seven hundred ninety-two million, seven hundred sixty-three thousand, four hundred ninety-four.

9,999,999 or negative nine million, nine hundred ninety-nine thousand, nine hundred ninety nine

Thirty-five billion, seven hundred ninety million, ninety-five thousand, seven hundred twenty-seven trillionths.

One hundred ninety two thousand forty.

90,300,502 is: ninety million three hundred thousand five hundred two.

Three hundred twenty million, forty-four thousand, three hundred ninety-three.

The number 821,190,000 is "eight hundred twenty-one million, one hundred ninety thousand."