66330223 has 4 divisors (see below), whose sum is σ = 66769648. Its totient is φ = 65890800.

The previous prime is 66330211. The next prime is 66330239. The reversal of 66330223 is 32203366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66330223 - 2⁵ = 66330191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66330283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219486 + ... + 219787.

It is an arithmetic number, because the mean of its divisors is an integer number (16692412).

Almost surely, 2^66330223 is an apocalyptic number.

66330223 is a deficient number, since it is larger than the sum of its proper divisors (439425).

66330223 is a wasteful number, since it uses less digits than its factorization.

66330223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439424.

The product of its (nonzero) digits is 3888, while the sum is 25.

The square root of 66330223 is about 8144.3368668051. The cubic root of 66330223 is about 404.7968762452.

Adding to 66330223 its reverse (32203366), we get a palindrome (98533589).

The spelling of 66330223 in words is "sixty-six million, three hundred thirty thousand, two hundred twenty-three".