66328329 has 4 divisors (see below), whose sum is σ = 88437776. Its totient is φ = 44218884.

The previous prime is 66328319. The next prime is 66328351. The reversal of 66328329 is 92382366.

66328329 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66328329 - 2¹² = 66324233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66328319) 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, 11054719 + ... + 11054724.

It is an arithmetic number, because the mean of its divisors is an integer number (22109444).

Almost surely, 2^66328329 is an apocalyptic number.

It is an amenable number.

66328329 is a deficient number, since it is larger than the sum of its proper divisors (22109447).

66328329 is a wasteful number, since it uses less digits than its factorization.

66328329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22109446.

The product of its digits is 93312, while the sum is 39.

The square root of 66328329 is about 8144.2205888593. The cubic root of 66328329 is about 404.7930233380.

The spelling of 66328329 in words is "sixty-six million, three hundred twenty-eight thousand, three hundred twenty-nine".