66850133 has 16 divisors (see below), whose sum is σ = 79687680. Its totient is φ = 54867456.

The previous prime is 66850117. The next prime is 66850139. The reversal of 66850133 is 33105866.

It is not a de Polignac number, because 66850133 - 2⁴ = 66850117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66850133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66850139) 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, 24485 + ... + 27077.

It is an arithmetic number, because the mean of its divisors is an integer number (4980480).

Almost surely, 2^66850133 is an apocalyptic number.

It is an amenable number.

66850133 is a deficient number, since it is larger than the sum of its proper divisors (12837547).

66850133 is a wasteful number, since it uses less digits than its factorization.

66850133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 66850133 is about 8176.1930627891. The cubic root of 66850133 is about 405.8517521147.

Adding to 66850133 its reverse (33105866), we get a palindrome (99955999).

The spelling of 66850133 in words is "sixty-six million, eight hundred fifty thousand, one hundred thirty-three".