668216222 has 8 divisors (see below), whose sum is σ = 1034657472. Its totient is φ = 323330400.

The previous prime is 668216203. The next prime is 668216239. The reversal of 668216222 is 222612866.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5388779 + ... + 5388902.

It is an arithmetic number, because the mean of its divisors is an integer number (129332184).

Almost surely, 2^668216222 is an apocalyptic number.

668216222 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

668216222 is a deficient number, since it is larger than the sum of its proper divisors (366441250).

668216222 is a wasteful number, since it uses less digits than its factorization.

668216222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10777714.

The product of its digits is 27648, while the sum is 35.

The square root of 668216222 is about 25849.8785683802. The cubic root of 668216222 is about 874.2567716533.

The spelling of 668216222 in words is "six hundred sixty-eight million, two hundred sixteen thousand, two hundred twenty-two".