66589604 has 24 divisors (see below), whose sum is σ = 123029760. Its totient is φ = 31448736.

The previous prime is 66589591. The next prime is 66589609. The reversal of 66589604 is 40698566.

66589604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66589609) 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 7 ways as a sum of consecutive naturals, for example, 29069 + ... + 31275.

It is an arithmetic number, because the mean of its divisors is an integer number (5126240).

Almost surely, 2^66589604 is an apocalyptic number.

It is an amenable number.

66589604 is a deficient number, since it is larger than the sum of its proper divisors (56440156).

66589604 is a wasteful number, since it uses less digits than its factorization.

66589604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627 (or 2625 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 66589604 is about 8160.2453394491. The cubic root of 66589604 is about 405.3238358977.

The spelling of 66589604 in words is "sixty-six million, five hundred eighty-nine thousand, six hundred four".