66171328 has 14 divisors (see below), whose sum is σ = 131308856. Its totient is φ = 33085632.

The previous prime is 66171323. The next prime is 66171337. The reversal of 66171328 is 82317166.

66171328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66171293 and 66171302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66171323) 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 as a sum of consecutive naturals, namely, 516900 + ... + 517027.

It is an arithmetic number, because the mean of its divisors is an integer number (9379204).

Almost surely, 2^66171328 is an apocalyptic number.

It is an amenable number.

66171328 is a deficient number, since it is larger than the sum of its proper divisors (65137528).

66171328 is a wasteful number, since it uses less digits than its factorization.

66171328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033939 (or 1033929 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 66171328 is about 8134.5760799196. The cubic root of 66171328 is about 404.4733855589.

The spelling of 66171328 in words is "sixty-six million, one hundred seventy-one thousand, three hundred twenty-eight".