668801681228 has 12 divisors (see below), whose sum is σ = 1170600586680. Its totient is φ = 334344370752.

The previous prime is 668801681227. The next prime is 668801681267. The reversal of 668801681228 is 822186108866.

It is not an unprimeable number, because it can be changed into a prime (668801681227) 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, 14090813 + ... + 14138196.

It is an arithmetic number, because the mean of its divisors is an integer number (97550048890).

Almost surely, 2^668801681228 is an apocalyptic number.

It is an amenable number.

668801681228 is a deficient number, since it is larger than the sum of its proper divisors (501798905452).

668801681228 is a wasteful number, since it uses less digits than its factorization.

668801681228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28234936 (or 28234934 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 56.

The spelling of 668801681228 in words is "six hundred sixty-eight billion, eight hundred one million, six hundred eighty-one thousand, two hundred twenty-eight".