The number 70 (seventy) is the natural number following 69 and preceding 71. Here are key facts about the number 70: Mathematics:
It is a composite number, an Erdős–Woods number, a Pell number, and a central binomial coefficient.
It is the smallest weird number, meaning it is an abundant number that is not semi-perfect (the sum of its proper divisors is greater than the number, but no subset of those divisors sums to the number).
It is a Harshad number (divisible by the sum of its digits: 70 ÷ (7+0) = 10).
It is the smallest number that is the sum of two primes in six different ways. Science: It is the atomic number of Ytterbium (Yb). 70 Panopaea is a main-belt asteroid. Religion and History:
In Jewish tradition, the Septuagint (Greek translation of the Torah) is often represented by LXX (70) because 72 scholars supposedly translated it.
In Islam, 70 (or 72) is frequently used as a number representing a vast or infinite amount. Other Uses:
In the United States, 70 is the age at which a person can receive the maximum Social Security retirement benefits.
A 70th wedding anniversary is sometimes referred to as a platinum anniversary. Spelling: The spelling is S-E-V-E-N-T-Y.