66748668 has 48 divisors (see below), whose sum is σ = 185740800. Its totient is φ = 18241344.

The previous prime is 66748639. The next prime is 66748687. The reversal of 66748668 is 86684766.

It is a self number, because there is not a number n which added to its sum of digits gives 66748668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15343 + ... + 19206.

It is an arithmetic number, because the mean of its divisors is an integer number (3869600).

Almost surely, 2^66748668 is an apocalyptic number.

It is an amenable number.

66748668 is an abundant number, since it is smaller than the sum of its proper divisors (118992132).

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

66748668 is a wasteful number, since it uses less digits than its factorization.

66748668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34586 (or 34584 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 51.

The square root of 66748668 is about 8169.9858017012. The cubic root of 66748668 is about 405.6463144791.

The spelling of 66748668 in words is "sixty-six million, seven hundred forty-eight thousand, six hundred sixty-eight".