66880160 has 48 divisors (see below), whose sum is σ = 159014016. Its totient is φ = 26581248.

The previous prime is 66880157. The next prime is 66880199. The reversal of 66880160 is 6108866.

It is a self number, because there is not a number n which added to its sum of digits gives 66880160.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25469 + ... + 27971.

It is an arithmetic number, because the mean of its divisors is an integer number (3312792).

Almost surely, 2^66880160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66880160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79507008).

66880160 is an abundant number, since it is smaller than the sum of its proper divisors (92133856).

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

66880160 is a wasteful number, since it uses less digits than its factorization.

66880160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2685 (or 2677 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 66880160 is about 8178.0291024183. The cubic root of 66880160 is about 405.9125083459.

The spelling of 66880160 in words is "sixty-six million, eight hundred eighty thousand, one hundred sixty".