220391866 has 8 divisors (see below), whose sum is σ = 330675264. Its totient is φ = 110166780.

The previous prime is 220391827. The next prime is 220391879. The reversal of 220391866 is 668193022.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3420 + ... + 21271.

It is an arithmetic number, because the mean of its divisors is an integer number (41334408).

Almost surely, 2^220391866 is an apocalyptic number.

220391866 is a deficient number, since it is larger than the sum of its proper divisors (110283398).

220391866 is a wasteful number, since it uses less digits than its factorization.

220391866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29156.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 220391866 is about 14845.6008972355. The cubic root of 220391866 is about 604.0392884842.

The spelling of 220391866 in words is "two hundred twenty million, three hundred ninety-one thousand, eight hundred sixty-six".