66623333 has 8 divisors (see below), whose sum is σ = 76216320. Its totient is φ = 57049200.

The previous prime is 66623303. The next prime is 66623351. The reversal of 66623333 is 33332666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66623333 - 2⁶ = 66623269 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 66623333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66623303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3923 + ... + 12191.

It is an arithmetic number, because the mean of its divisors is an integer number (9527040).

Almost surely, 2^66623333 is an apocalyptic number.

It is an amenable number.

66623333 is a deficient number, since it is larger than the sum of its proper divisors (9592987).

66623333 is a wasteful number, since it uses less digits than its factorization.

66623333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9427.

The product of its digits is 34992, while the sum is 32.

The square root of 66623333 is about 8162.3117436177. The cubic root of 66623333 is about 405.3922592914.

Adding to 66623333 its reverse (33332666), we get a palindrome (99955999).

The spelling of 66623333 in words is "sixty-six million, six hundred twenty-three thousand, three hundred thirty-three".