66628448 has 24 divisors (see below), whose sum is σ = 132053040. Its totient is φ = 33091200.

The previous prime is 66628439. The next prime is 66628451. The reversal of 66628448 is 84482666.

It is a junction number, because it is equal to n+sod(n) for n = 66628399 and 66628408.

It is a congruent number.

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, 2063 + ... + 11726.

It is an arithmetic number, because the mean of its divisors is an integer number (5502210).

Almost surely, 2^66628448 is an apocalyptic number.

It is an amenable number.

66628448 is a deficient number, since it is larger than the sum of its proper divisors (65424592).

66628448 is a wasteful number, since it uses less digits than its factorization.

66628448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13950 (or 13942 counting only the distinct ones).

The product of its digits is 442368, while the sum is 44.

The square root of 66628448 is about 8162.6250679545. The cubic root of 66628448 is about 405.4026336765.

It can be divided in two parts, 66628 and 448, that added together give a palindrome (67076).

The spelling of 66628448 in words is "sixty-six million, six hundred twenty-eight thousand, four hundred forty-eight".