220045666 has 16 divisors (see below), whose sum is σ = 336962808. Its totient is φ = 107740800.

The previous prime is 220045619. The next prime is 220045703. The reversal of 220045666 is 666540022.

It can be written as a sum of positive squares in 4 ways, for example, as 62015625 + 158030041 = 7875^2 + 12571^2 .

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 in 7 ways as a sum of consecutive naturals, for example, 24556 + ... + 32296.

Almost surely, 2^220045666 is an apocalyptic number.

220045666 is a deficient number, since it is larger than the sum of its proper divisors (116917142).

220045666 is a wasteful number, since it uses less digits than its factorization.

220045666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8037.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 220045666 is about 14833.9362948612. The cubic root of 220045666 is about 603.7228400323.

Adding to 220045666 its reverse (666540022), we get a palindrome (886585688).

The spelling of 220045666 in words is "two hundred twenty million, forty-five thousand, six hundred sixty-six".