66422028 has 12 divisors (see below), whose sum is σ = 154984760. Its totient is φ = 22140672.

The previous prime is 66422003. The next prime is 66422039. The reversal of 66422028 is 82022466.

66422028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 66421986 and 66422004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2767573 + ... + 2767596.

Almost surely, 2^66422028 is an apocalyptic number.

It is an amenable number.

66422028 is an abundant number, since it is smaller than the sum of its proper divisors (88562732).

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

66422028 is a wasteful number, since it uses less digits than its factorization.

66422028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5535176 (or 5535174 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 66422028 is about 8149.9710428933. The cubic root of 66422028 is about 404.9835445227.

The spelling of 66422028 in words is "sixty-six million, four hundred twenty-two thousand, twenty-eight".