<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE ANNUAL REPORT OF AMERICAN CENTURY MUTUAL FUNDS, INC.
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH REPORT.
</LEGEND>
<CIK> 0000100334
<NAME> AMERICAN CENTURY MUTUAL FUNDS, INC.
<SERIES>
<NUMBER> 51
<NAME> GIFTRUST FUND
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-2000
<PERIOD-END> OCT-31-2000
<INVESTMENTS-AT-COST> 1,399,190
<INVESTMENTS-AT-VALUE> 212,976
<RECEIVABLES> 37,412
<ASSETS-OTHER> 172
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 2,166,560
<PAYABLE-FOR-SECURITIES> 78,683
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,804
<TOTAL-LIABILITIES> 80,487
<SENIOR-EQUITY> 477
<PAID-IN-CAPITAL-COMMON> 963,709
<SHARES-COMMON-STOCK> 47,726
<SHARES-COMMON-PRIOR> 47,328
<ACCUMULATED-NII-CURRENT> (15,008)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 407,109
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 729,786
<NET-ASSETS> 2,086,073
<DIVIDEND-INCOME> 496
<INTEREST-INCOME> 4,466
<OTHER-INCOME> 0
<EXPENSES-NET> 19,970
<NET-INVESTMENT-INCOME> (15,008)
<REALIZED-GAINS-CURRENT> 531,228
<APPREC-INCREASE-CURRENT> 275,993
<NET-CHANGE-FROM-OPS> 792,213
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,487
<NUMBER-OF-SHARES-REDEEMED> (1,409)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 835,804
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (124,119)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 19,960
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 19,970
<AVERAGE-NET-ASSETS> 1,994,525
<PER-SHARE-NAV-BEGIN> 26.80
<PER-SHARE-NII> (0.32)
<PER-SHARE-GAIN-APPREC> 17.23
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 43.71
<EXPENSE-RATIO> 1.00
</TABLE>
