About the Number 65 (sixty-five)
Isaac Hayes Dead at Age 65 (10 Days Shy of 66)

Isaac Hayes died on 10 August 2008 at the age of 65. Isaac would have turned 66 on 20 August 2008. 

   MathBabbler Number Analyst (MBNA) output:
   =========================================
   65 is a natural, whole, integer
   65 is odd
   65 proper divisors are: 1,5,13,
   65 is deficient (sum of divisors is 19)
   65 is unhappy
   65 is not a Harshad number
   65 is not prime
   65 is undulating
   65 has the prime factors: 5*13
   65 in octal is 0101
   65 in hexadecimal is 0x41
   65 in binary is 1000001 (is evil)
   65 nearest square numbers: -1...16 (64 [8]...81 [9])
   sqrt(65) = 8.06226
   ln(65) = 4.17439
   log(65) = 1.81291
   65 reciprocal is .01538461538461538461538461538461
   65 is 20.6901 Pi years
   65 is 3 score and 5 years

From Wikipedia.org... 

   Beach Boys (24 July 1967): 
   "At threescore and five 
    I'm very much alive 
    I've still got the jive
    to survive with the Heroes and Villains."

MathBabbler didn't think anything about it, but the Wikipedia entry for the number 65 reminded him that 65 is a popular retirement age.

Exercises

  1. No or Yes: 65 = 1^5 + 2^4 + 3^3 + 4^2 + 5^1

  2. No or Yes: 65 is 1018 and 1012 is a prime factor of 65.

  3. No or Yes or Maybe: At the time of his death, Isaac Hayes was the same age as the "still got the jive" Beach Boy.

  4. http://commandline.org.uk/more/2008/jul/26/threescore-and-five/
    No or Yes or Maybe: 65 is the smallest number that becomes square if its reverse is either added to or subtracted from it.

Update::2009.08.25

MathBabbler learned that on 9 August 2009, Smokey Bear turned 65 years of age.

The MBNA (MathBabbler Number Analyst) had lots of functionality added to it since the time this nBAB was created on 10 August 2008, so MBNA output has been re-inserted. 

   MathBabbler Number Analyst (MBNA) output:
   =========================================
   65 is a natural, whole, integer
   65 is odd
   65 proper divisors are: 1,5,13,
   65 is deficient (sum of divisors is 19)
   65 is unhappy
   65 is not a Harshad number
   65 is not prime
   65 has the prime factors: 5*13 (sum=18)
   65 is semiprime (biprime or 2-almost prime)
   65 sum of prime factors is: 18
   65 is undulating
   65 is a Padovan number(37+28)
   65 is ThurmNumber
   65 in octal is 0101
   65 in hexadecimal is 0x41
   65 in binary is 1000001 (is evil)
   65 nearest square numbers: -1...16 (64...81 [9])
   sqrt(65) = 8.06226
   ln(65) = 4.17439
   log(65) = 1.81291
   65 reciprocal is .01538461538461538461538461538461
   65! is 8.24765e+90
   65 is 20.6901 Pi years
   65 is 3 score and 5 years
   65 written as a Roman numeral is LXV
   65 in base-12 is repdigit number 77 in base-10

Note: This nBAB was created on 10 August 2008, which was one day after Smokey Bear turned 64 years of age.

65 in base-60 is 365 in base-10 (or the number of days in a non-leap year.

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 10 August 2008

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