What is seventy?

Seventy is a cardinal number that comes after sixty-nine and before seventy-one. It is written as 70 in decimal notation and as LXX in Roman numerals. It is the sum of six tens, and its factors are 1, 2, 5, 7, 10, 14, 35, and 70.

In mathematics, seventy is an abundant number, meaning it has an aliquot sum greater than the number itself. Its aliquot sum is 126, which is the sum of its proper divisors (1, 2, 5, 7, 10, 14, 35).

In terms of measurements, seventy inches is equivalent to 5 feet 10 inches or 177.8 centimeters. Similarly, seventy pounds is equivalent to 31.75 kilograms.

In culture and society, seventy is often associated with old age and retirement. Many countries have retirement ages set at 65 or 70, and 70th birthday celebrations are often seen as significant milestones. In some religious traditions, seventy is a symbolic number representing the fullness of time or completion of an era.