66280 has 16 divisors (see below), whose sum is σ = 149220. Its totient is φ = 26496.

The previous prime is 66271. The next prime is 66293. The reversal of 66280 is 8266.

It can be written as a sum of positive squares in 2 ways, for example, as 64516 + 1764 = 254^2 + 42^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 789 + ... + 868.

2⁶⁶²⁸⁰ is an apocalyptic number.

It is an amenable number.

66280 is an abundant number, since it is smaller than the sum of its proper divisors (82940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74610).

66280 is a wasteful number, since it uses less digits than its factorization.

66280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668 (or 1664 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 66280 is about 257.4490240805. The cubic root of 66280 is about 40.4694684284.

The spelling of 66280 in words is "sixty-six thousand, two hundred eighty".