66884428 has 12 divisors (see below), whose sum is σ = 126051520. Its totient is φ = 30869712.

The previous prime is 66884401. The next prime is 66884449. The reversal of 66884428 is 82448866.

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, 643068 + ... + 643171.

Almost surely, 2^66884428 is an apocalyptic number.

It is an amenable number.

66884428 is a deficient number, since it is larger than the sum of its proper divisors (59167092).

66884428 is a wasteful number, since it uses less digits than its factorization.

66884428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286256 (or 1286254 counting only the distinct ones).

The product of its digits is 589824, while the sum is 46.

The square root of 66884428 is about 8178.2900413228. The cubic root of 66884428 is about 405.9211426840.

The spelling of 66884428 in words is "sixty-six million, eight hundred eighty-four thousand, four hundred twenty-eight".