66748628 has 12 divisors (see below), whose sum is σ = 116867520. Its totient is φ = 33357912.

The previous prime is 66748621. The next prime is 66748631. The reversal of 66748628 is 82684766.

66748628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66748621) by changing a digit.

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, 12725 + ... + 17187.

It is an arithmetic number, because the mean of its divisors is an integer number (9738960).

Almost surely, 2^66748628 is an apocalyptic number.

It is an amenable number.

66748628 is a deficient number, since it is larger than the sum of its proper divisors (50118892).

66748628 is a wasteful number, since it uses less digits than its factorization.

66748628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8206 (or 8204 counting only the distinct ones).

The product of its digits is 774144, while the sum is 47.

The square root of 66748628 is about 8169.9833537162. The cubic root of 66748628 is about 405.6462334495.

It can be divided in two parts, 66748 and 628, that added together give a palindrome (67376).

The spelling of 66748628 in words is "sixty-six million, seven hundred forty-eight thousand, six hundred twenty-eight".