66243133 has 16 divisors (see below), whose sum is σ = 73923840. Its totient is φ = 58852800.

The previous prime is 66243113. The next prime is 66243137. The reversal of 66243133 is 33134266.

It is not a de Polignac number, because 66243133 - 2²⁵ = 32688701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66243137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180316 + ... + 180682.

It is an arithmetic number, because the mean of its divisors is an integer number (4620240).

Almost surely, 2^66243133 is an apocalyptic number.

It is an amenable number.

66243133 is a deficient number, since it is larger than the sum of its proper divisors (7680707).

66243133 is a wasteful number, since it uses less digits than its factorization.

66243133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708.

The product of its digits is 7776, while the sum is 28.

The square root of 66243133 is about 8138.9884506614. The cubic root of 66243133 is about 404.6196357721.

Adding to 66243133 its reverse (33134266), we get a palindrome (99377399).

The spelling of 66243133 in words is "sixty-six million, two hundred forty-three thousand, one hundred thirty-three".