66328303 has 4 divisors (see below), whose sum is σ = 66346408. Its totient is φ = 66310200.

The previous prime is 66328291. The next prime is 66328319. The reversal of 66328303 is 30382366.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66328303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66328363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1401 + ... + 11602.

It is an arithmetic number, because the mean of its divisors is an integer number (16586602).

Almost surely, 2^66328303 is an apocalyptic number.

66328303 is a deficient number, since it is larger than the sum of its proper divisors (18105).

66328303 is a wasteful number, since it uses less digits than its factorization.

66328303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18104.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 66328303 is about 8144.2189926352. The cubic root of 66328303 is about 404.7929704465.

The spelling of 66328303 in words is "sixty-six million, three hundred twenty-eight thousand, three hundred three".