66448028 has 12 divisors (see below), whose sum is σ = 116610480. Its totient is φ = 33130752.

The previous prime is 66448021. The next prime is 66448033. The reversal of 66448028 is 82084466.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66447982 and 66448000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66448021) 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 3 ways as a sum of consecutive naturals, for example, 21701 + ... + 24572.

It is an arithmetic number, because the mean of its divisors is an integer number (9717540).

Almost surely, 2^66448028 is an apocalyptic number.

It is an amenable number.

66448028 is a deficient number, since it is larger than the sum of its proper divisors (50162452).

66448028 is a wasteful number, since it uses less digits than its factorization.

66448028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46636 (or 46634 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 66448028 is about 8151.5659845210. The cubic root of 66448028 is about 405.0363793973.

The spelling of 66448028 in words is "sixty-six million, four hundred forty-eight thousand, twenty-eight".