66571332 has 12 divisors (see below), whose sum is σ = 155333136. Its totient is φ = 22190440.

The previous prime is 66571301. The next prime is 66571343. The reversal of 66571332 is 23317566.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 66571293 and 66571302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2773794 + ... + 2773817.

It is an arithmetic number, because the mean of its divisors is an integer number (12944428).

Almost surely, 2^66571332 is an apocalyptic number.

It is an amenable number.

66571332 is an abundant number, since it is smaller than the sum of its proper divisors (88761804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66571332 is a wasteful number, since it uses less digits than its factorization.

66571332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5547618 (or 5547616 counting only the distinct ones).

The product of its digits is 22680, while the sum is 33.

The square root of 66571332 is about 8159.1256884546. The cubic root of 66571332 is about 405.2867592662.

Adding to 66571332 its reverse (23317566), we get a palindrome (89888898).

The spelling of 66571332 in words is "sixty-six million, five hundred seventy-one thousand, three hundred thirty-two".