66328371 has 12 divisors (see below), whose sum is σ = 96963048. Its totient is φ = 43685664.

The previous prime is 66328363. The next prime is 66328391. The reversal of 66328371 is 17382366.

It is a happy number.

It is not a de Polignac number, because 66328371 - 2³ = 66328363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66328351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43650 + ... + 45143.

It is an arithmetic number, because the mean of its divisors is an integer number (8080254).

Almost surely, 2^66328371 is an apocalyptic number.

66328371 is a deficient number, since it is larger than the sum of its proper divisors (30634677).

66328371 is a wasteful number, since it uses less digits than its factorization.

66328371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88882 (or 88879 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 66328371 is about 8144.2231673745. The cubic root of 66328371 is about 404.7931087782.

The spelling of 66328371 in words is "sixty-six million, three hundred twenty-eight thousand, three hundred seventy-one".