220385866 has 8 divisors (see below), whose sum is σ = 330714720. Its totient is φ = 110147628.

The previous prime is 220385861. The next prime is 220385903. The reversal of 220385866 is 668583022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (220385861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16206 + ... + 26521.

It is an arithmetic number, because the mean of its divisors is an integer number (41339340).

Almost surely, 2^220385866 is an apocalyptic number.

220385866 is a deficient number, since it is larger than the sum of its proper divisors (110328854).

220385866 is a wasteful number, since it uses less digits than its factorization.

220385866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45308.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 220385866 is about 14845.3988157947. The cubic root of 220385866 is about 604.0338069319.

The spelling of 220385866 in words is "two hundred twenty million, three hundred eighty-five thousand, eight hundred sixty-six".