66328133 has 4 divisors (see below), whose sum is σ = 68615340. Its totient is φ = 64040928.

The previous prime is 66328121. The next prime is 66328151. The reversal of 66328133 is 33182366.

66328133 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 can be written as a sum of positive squares in 2 ways, for example, as 13300609 + 53027524 = 3647^2 + 7282^2 .

It is a cyclic number.

It is not a de Polignac number, because 66328133 - 2²² = 62133829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66328133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66328103) 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, 1143560 + ... + 1143617.

It is an arithmetic number, because the mean of its divisors is an integer number (17153835).

Almost surely, 2^66328133 is an apocalyptic number.

It is an amenable number.

66328133 is a deficient number, since it is larger than the sum of its proper divisors (2287207).

66328133 is a wasteful number, since it uses less digits than its factorization.

66328133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287206.

The product of its digits is 15552, while the sum is 32.

The square root of 66328133 is about 8144.2085557775. The cubic root of 66328133 is about 404.7926246170.

The spelling of 66328133 in words is "sixty-six million, three hundred twenty-eight thousand, one hundred thirty-three".