About the Number 77 (seventy-seven)

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 77.

   MathBabbler 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

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

Update::2009.08.26

Edward "Ted" Kennedy died on 25 August 2009 at the age of 77.

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.

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 29 March 2009