220800666 has 16 divisors (see below), whose sum is σ = 444780000. Its totient is φ = 73070448.

The previous prime is 220800623. The next prime is 220800673. The reversal of 220800666 is 666008022.

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, 131541 + ... + 133208.

It is an arithmetic number, because the mean of its divisors is an integer number (27798750).

Almost surely, 2^220800666 is an apocalyptic number.

220800666 is an abundant number, since it is smaller than the sum of its proper divisors (223979334).

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

220800666 is a wasteful number, since it uses less digits than its factorization.

220800666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264893.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 220800666 is about 14859.3629069351. The cubic root of 220800666 is about 604.4125308471.

Adding to 220800666 its reverse (666008022), we get a palindrome (886808688).

The spelling of 220800666 in words is "two hundred twenty million, eight hundred thousand, six hundred sixty-six".