66290133 has 32 divisors (see below), whose sum is σ = 111333376. Its totient is φ = 34147008.

The previous prime is 66290113. The next prime is 66290141. The reversal of 66290133 is 33109266.

It is a happy number.

It is not a de Polignac number, because 66290133 - 2⁵ = 66290101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66290133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66290113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8916 + ... + 14562.

It is an arithmetic number, because the mean of its divisors is an integer number (3479168).

Almost surely, 2^66290133 is an apocalyptic number.

It is an amenable number.

66290133 is a deficient number, since it is larger than the sum of its proper divisors (45043243).

66290133 is a wasteful number, since it uses less digits than its factorization.

66290133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5713.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 66290133 is about 8141.8752753896. The cubic root of 66290133 is about 404.7153067053.

Adding to 66290133 its reverse (33109266), we get a palindrome (99399399).

The spelling of 66290133 in words is "sixty-six million, two hundred ninety thousand, one hundred thirty-three".