66880286 has 16 divisors (see below), whose sum is σ = 109585008. Its totient is φ = 30360000.

The previous prime is 66880283. The next prime is 66880301. The reversal of 66880286 is 68208866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66880283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20786 + ... + 23786.

It is an arithmetic number, because the mean of its divisors is an integer number (6849063).

Almost surely, 2^66880286 is an apocalyptic number.

66880286 is a deficient number, since it is larger than the sum of its proper divisors (42704722).

66880286 is a wasteful number, since it uses less digits than its factorization.

66880286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4027.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 66880286 is about 8178.0368059822. The cubic root of 66880286 is about 405.9127632543.

The spelling of 66880286 in words is "sixty-six million, eight hundred eighty thousand, two hundred eighty-six".