233220666 has 32 divisors (see below), whose sum is σ = 535223808. Its totient is φ = 66366000.

The previous prime is 233220661. The next prime is 233220679. The reversal of 233220666 is 666022332.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (233220661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520 + ... + 21603.

It is an arithmetic number, because the mean of its divisors is an integer number (16725744).

Almost surely, 2^233220666 is an apocalyptic number.

233220666 is an abundant number, since it is smaller than the sum of its proper divisors (302003142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

233220666 is a wasteful number, since it uses less digits than its factorization.

233220666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22386.

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 233220666 is about 15271.5639670598. The cubic root of 233220666 is about 615.5391451678.

Adding to 233220666 its reverse (666022332), we get a palindrome (899242998).

The spelling of 233220666 in words is "two hundred thirty-three million, two hundred twenty thousand, six hundred sixty-six".