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A058627
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Numbers n such that phi(n) = product of the digits of n.
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2
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1, 24, 26, 87, 168, 388, 594, 666, 1998, 2688, 5698, 5978, 6786, 7888, 68796
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| C. A. Pickover, "Wonders of Numbers, Adventures in Mathematics, Mind and Meaning," Oxford University Press, NY 2000, Chapter 72, 'Apocalyptic Numbers,' Pages 176 - 178.
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LINKS
| C. A. Pickover, "Wonders of Numbers, Adventures in Mathematics, Mind and Meaning," Zentralblatt review
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EXAMPLE
| Phi(666) = 6*6*6
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MATHEMATICA
| Select[ Range[ 10^7], EulerPhi[ # ] == Times @@ IntegerDigits[ # ] &]
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CROSSREFS
| Sequence in context: A079720 A053680 A053968 * A116203 A071833 A064159
Adjacent sequences: A058624 A058625 A058626 * A058628 A058629 A058630
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KEYWORD
| nonn,base
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AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 26 2000
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