66228028 has 24 divisors (see below), whose sum is σ = 120032640. Its totient is φ = 31940160.

The previous prime is 66227989. The next prime is 66228037. The reversal of 66228028 is 82082266.

It is a junction number, because it is equal to n+sod(n) for n = 66227984 and 66228002.

It is a congruent number.

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, 47550 + ... + 48922.

It is an arithmetic number, because the mean of its divisors is an integer number (5001360).

Almost surely, 2^66228028 is an apocalyptic number.

It is an amenable number.

66228028 is a deficient number, since it is larger than the sum of its proper divisors (53804612).

66228028 is a wasteful number, since it uses less digits than its factorization.

66228028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797 (or 1795 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 66228028 is about 8138.0604568902. The cubic root of 66228028 is about 404.5888791541.

The spelling of 66228028 in words is "sixty-six million, two hundred twenty-eight thousand, twenty-eight".