### About the Number 665 (six hundred sixty-five)

According to Maps.Google.com, the driving distance between Green Bay, WI, and Pittsburgh, PA, is 665 miles.

```   MathBabbler Number Analyst (MBNA) output:
=========================================
665 is a natural, whole, integer
665 is odd
665 proper divisors are: 1,5,7,19,35,95,133,
665 is deficient (sum of divisors is 295)
665 is happy
665 is not a Harshad number
665 is not prime
665 has the prime factors: 5*7*19 (sum=31)
665 is sphenic (had 3 unique prime factors)
665 sum of prime factors is: 31
665 in octal is 01231
665 in binary is 1010011001 (is odious)
665 nearest square numbers: -40...11 (625...676 [26])
sqrt(665) = 25.7876
ln(665) = 6.49979
log(665) = 2.82282
665 reciprocal is .00150375939849624060150375939849
665! is 1.51747e+1590
665 is 211.676 Pi years
665 is 33 score and 5 years
665 written as a Roman numeral is DCLXV
665 = 333^2 - 332^2 and 333 + 332 = 665
```

`log(665)` = 2.71062, which when rounded to the nearest hundredth equals e (2.7182818284590) truncated to two decimal digits.

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 25 January 2011 (posted 31 January 2011)