Seventy Seven (77)
1. It is the product of two odd primes.
77 = 7 x 11
2. It is the sum of first 8 prime numbers.
77 = 2 + 3 + 5 + 7 + 11 + 13 + 17 + 19
3. Any number that is based on the pattern abcabc will be divisible by 77.
123123 ÷ 77 = 1599
4. It is the largest number that cannot be written as the sum of distinct numbers whose reciprocals add up to 1.
78 = 2 + 6 + 8 + 10 + 12 + 40
1 = ½ + 1/6 + 1/8 + 1/10 + 1/12 + 1/40
5. FORTRAN 77 was a computer programming developed by IBM in 1950.
6. It can be expressed as the sum of squares of three consecutive numbers.
77 = 4^2 + 5^2 + 5^2
7. The atomic number of Iridium is 77.
8. It can be partitioned 39 times with each tern not larger than 2 and 533 times with each term no larger than 2.
Dr Rajesh Kumar Thakur
rkthakur1974@gmail.com
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