66213333 has 24 divisors (see below), whose sum is σ = 97651008. Its totient is φ = 43225152.

The previous prime is 66213311. The next prime is 66213361. The reversal of 66213333 is 33331266.

66213333 is a `hidden beast` number, since 6 + 621 + 3 + 3 + 33 = 666.

It is not a de Polignac number, because 66213333 - 2⁹ = 66212821 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66213297 and 66213306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66213533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102016 + ... + 102662.

It is an arithmetic number, because the mean of its divisors is an integer number (4068792).

Almost surely, 2^66213333 is an apocalyptic number.

It is an amenable number.

66213333 is a deficient number, since it is larger than the sum of its proper divisors (31437675).

66213333 is a wasteful number, since it uses less digits than its factorization.

66213333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873 (or 870 counting only the distinct ones).

The product of its digits is 5832, while the sum is 27.

The square root of 66213333 is about 8137.1575503981. The cubic root of 66213333 is about 404.5589528850.

Adding to 66213333 its reverse (33331266), we get a palindrome (99544599).

The spelling of 66213333 in words is "sixty-six million, two hundred thirteen thousand, three hundred thirty-three".