222126664 has 8 divisors (see below), whose sum is σ = 416487510. Its totient is φ = 111063328.

The previous prime is 222126659. The next prime is 222126703. The reversal of 222126664 is 466621222.

It can be written as a sum of positive squares in only one way, i.e., 129004164 + 93122500 = 11358^2 + 9650^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13882909 + ... + 13882924.

Almost surely, 2^222126664 is an apocalyptic number.

It is an amenable number.

222126664 is a deficient number, since it is larger than the sum of its proper divisors (194360846).

222126664 is a wasteful number, since it uses less digits than its factorization.

222126664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27765839 (or 27765835 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 222126664 is about 14903.9143851540. The cubic root of 222126664 is about 605.6200314231.

Adding to 222126664 its reverse (466621222), we get a palindrome (688747886).

The spelling of 222126664 in words is "two hundred twenty-two million, one hundred twenty-six thousand, six hundred sixty-four".