66633222 has 8 divisors (see below), whose sum is σ = 133266456. Its totient is φ = 22211072.

The previous prime is 66633179. The next prime is 66633223. The reversal of 66633222 is 22233666.

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

66633222 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 66633222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66633223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5552763 + ... + 5552774.

It is an arithmetic number, because the mean of its divisors is an integer number (16658307).

Almost surely, 2^66633222 is an apocalyptic number.

66633222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66633222 is a wasteful number, since it uses less digits than its factorization.

66633222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11105542.

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

The square root of 66633222 is about 8162.9174931516. The cubic root of 66633222 is about 405.4123159569.

Adding to 66633222 its reverse (22233666), we get a palindrome (88866888).

The spelling of 66633222 in words is "sixty-six million, six hundred thirty-three thousand, two hundred twenty-two".