66345233 has 4 divisors (see below), whose sum is σ = 66451008. Its totient is φ = 66239460.

The previous prime is 66345229. The next prime is 66345263. The reversal of 66345233 is 33254366.

66345233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66345233 - 2² = 66345229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66345233.

It is not an unprimeable number, because it can be changed into a prime (66345263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51941 + ... + 53202.

It is an arithmetic number, because the mean of its divisors is an integer number (16612752).

Almost surely, 2^66345233 is an apocalyptic number.

It is an amenable number.

66345233 is a deficient number, since it is larger than the sum of its proper divisors (105775).

66345233 is a wasteful number, since it uses less digits than its factorization.

66345233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105774.

The product of its digits is 38880, while the sum is 32.

The square root of 66345233 is about 8145.2583138904. The cubic root of 66345233 is about 404.8274080430.

Adding to 66345233 its reverse (33254366), we get a palindrome (99599599).

The spelling of 66345233 in words is "sixty-six million, three hundred forty-five thousand, two hundred thirty-three".