On 27 March 2009 the DJIA closed at 7776.18, which prompted MathBabbler to create a nBAB for the number 7777. After posting the nBAB for 7777, MathBabbler observed that he had nBABs for 7 and 7777, but he did not nBABs for 777 and

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77MathBabbler Number Analyst (MBNA) output: ========================================= 77 is a natural, whole, integer 77 is odd 77 proper divisors are: 1,7,11, 77 is deficient (sum of divisors is 19) 77 is unhappy 77 is not a Harshad number 77 is not prime 77 is undulating 77 has the prime factors: 7*11 77 is semiprime (biprime or 2-almost prime) 77 in octal is 0115 77 in hexadecimal is 0x4d 77 in binary is 1001101 (is evil) 77 nearest square numbers: -13...4 (64...81 [9]) sqrt(77) = 8.77496 ln(77) = 4.34381 log(77) = 1.88649 77 reciprocal is .01298701298701298701298701298701 77! is 1.45183e+113 77 is 24.5099 Pi years 77 is 3 score and 17 years 77 written as a Roman numeral is LXXVII

`is a palindromic number. [Note: On 29 March 2009 the MBNA only checked prime numbers to see if they were palindromic.]`

77## Update::2009.08.26

Edward "Ted" Kennedy died on 25 August 2009 at the age of

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77

`is a repdigit number.`

77

`is a ThurmNumber because it is 3 score 17 and both the 3 and the 17 are prime numbers.`

77

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 29 March 2009

This work is licensed under a Creative Commons Attribution 3.0 United States License.