66641272 has 16 divisors (see below), whose sum is σ = 125908200. Its totient is φ = 33065760.

The previous prime is 66641269. The next prime is 66641279. The reversal of 66641272 is 27214666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66641279) 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, 30747 + ... + 32842.

Almost surely, 2^66641272 is an apocalyptic number.

It is an amenable number.

66641272 is a deficient number, since it is larger than the sum of its proper divisors (59266928).

66641272 is a wasteful number, since it uses less digits than its factorization.

66641272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63726 (or 63722 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 66641272 is about 8163.4105617689. The cubic root of 66641272 is about 405.4286413355.

The spelling of 66641272 in words is "sixty-six million, six hundred forty-one thousand, two hundred seventy-two".