66916628 has 12 divisors (see below), whose sum is σ = 118241760. Its totient is φ = 33133272.

The previous prime is 66916627. The next prime is 66916639. The reversal of 66916628 is 82661966.

66916628 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 (66916621) 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, 80798 + ... + 81621.

It is an arithmetic number, because the mean of its divisors is an integer number (9853480).

Almost surely, 2^66916628 is an apocalyptic number.

It is an amenable number.

66916628 is a deficient number, since it is larger than the sum of its proper divisors (51325132).

66916628 is a wasteful number, since it uses less digits than its factorization.

66916628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162526 (or 162524 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 66916628 is about 8180.2584311255. The cubic root of 66916628 is about 405.9862727610.

The spelling of 66916628 in words is "sixty-six million, nine hundred sixteen thousand, six hundred twenty-eight".