220331666 has 16 divisors (see below), whose sum is σ = 335688864. Its totient is φ = 108441504.

The previous prime is 220331641. The next prime is 220331689. The reversal of 220331666 is 666133022.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92705 + ... + 95051.

It is an arithmetic number, because the mean of its divisors is an integer number (20980554).

Almost surely, 2^220331666 is an apocalyptic number.

220331666 is a deficient number, since it is larger than the sum of its proper divisors (115357198).

220331666 is a wasteful number, since it uses less digits than its factorization.

220331666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3065.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 220331666 is about 14843.5732221052. The cubic root of 220331666 is about 603.9842857336.

Adding to 220331666 its reverse (666133022), we get a palindrome (886464688).

The spelling of 220331666 in words is "two hundred twenty million, three hundred thirty-one thousand, six hundred sixty-six".