66880443 has 12 divisors (see below), whose sum is σ = 103733160. Its totient is φ = 38217312.

The previous prime is 66880441. The next prime is 66880447. The reversal of 66880443 is 34408866.

It is not a de Polignac number, because 66880443 - 2¹ = 66880441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66880441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227338 + ... + 227631.

It is an arithmetic number, because the mean of its divisors is an integer number (8644430).

Almost surely, 2^66880443 is an apocalyptic number.

66880443 is a deficient number, since it is larger than the sum of its proper divisors (36852717).

66880443 is a wasteful number, since it uses less digits than its factorization.

66880443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454986 (or 454979 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 66880443 is about 8178.0464048573. The cubic root of 66880443 is about 405.9130808779.

The spelling of 66880443 in words is "sixty-six million, eight hundred eighty thousand, four hundred forty-three".