66089603 has 4 divisors (see below), whose sum is σ = 68963088. Its totient is φ = 63216120.

The previous prime is 66089599. The next prime is 66089609. The reversal of 66089603 is 30698066.

It is a happy number.

66089603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66089603 - 2² = 66089599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66089609) 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, 1436708 + ... + 1436753.

It is an arithmetic number, because the mean of its divisors is an integer number (17240772).

Almost surely, 2^66089603 is an apocalyptic number.

66089603 is a deficient number, since it is larger than the sum of its proper divisors (2873485).

66089603 is a wasteful number, since it uses less digits than its factorization.

66089603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2873484.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 66089603 is about 8129.5512176257. The cubic root of 66089603 is about 404.3068018021.

The spelling of 66089603 in words is "sixty-six million, eighty-nine thousand, six hundred three".