66042222 has 32 divisors (see below), whose sum is σ = 137134080. Its totient is φ = 21178080.

The previous prime is 66042217. The next prime is 66042239. The reversal of 66042222 is 22224066.

It is a junction number, because it is equal to n+sod(n) for n = 66042192 and 66042201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66147 + ... + 67137.

It is an arithmetic number, because the mean of its divisors is an integer number (4285440).

Almost surely, 2^66042222 is an apocalyptic number.

66042222 is an abundant number, since it is smaller than the sum of its proper divisors (71091858).

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

66042222 is a wasteful number, since it uses less digits than its factorization.

66042222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 66042222 is about 8126.6365736386. The cubic root of 66042222 is about 404.2101600742.

Adding to 66042222 its reverse (22224066), we get a palindrome (88266288).

The spelling of 66042222 in words is "sixty-six million, forty-two thousand, two hundred twenty-two".