66281272 has 16 divisors (see below), whose sum is σ = 130818600. Its totient is φ = 31396320.

The previous prime is 66281261. The next prime is 66281279. The reversal of 66281272 is 27218266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66281279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217879 + ... + 218182.

Almost surely, 2^66281272 is an apocalyptic number.

It is an amenable number.

66281272 is a deficient number, since it is larger than the sum of its proper divisors (64537328).

66281272 is a wasteful number, since it uses less digits than its factorization.

66281272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436086 (or 436082 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 66281272 is about 8141.3310950974. The cubic root of 66281272 is about 404.6972731409.

The spelling of 66281272 in words is "sixty-six million, two hundred eighty-one thousand, two hundred seventy-two".