66328413 has 16 divisors (see below), whose sum is σ = 90377856. Its totient is φ = 43258880.

The previous prime is 66328397. The next prime is 66328433. The reversal of 66328413 is 31482366.

It is not a de Polignac number, because 66328413 - 2⁴ = 66328397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66328433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28045 + ... + 30317.

It is an arithmetic number, because the mean of its divisors is an integer number (5648616).

Almost surely, 2^66328413 is an apocalyptic number.

It is an amenable number.

66328413 is a deficient number, since it is larger than the sum of its proper divisors (24049443).

66328413 is a wasteful number, since it uses less digits than its factorization.

66328413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484.

The product of its digits is 20736, while the sum is 33.

The square root of 66328413 is about 8144.2257458889. The cubic root of 66328413 is about 404.7931942183.

The spelling of 66328413 in words is "sixty-six million, three hundred twenty-eight thousand, four hundred thirteen".