668556916202 has 24 divisors (see below), whose sum is σ = 1166595368256. Its totient is φ = 286516589688.

The previous prime is 668556916201. The next prime is 668556916217. The reversal of 668556916202 is 202619655866.

It is not an unprimeable number, because it can be changed into a prime (668556916201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4869833 + ... + 5005235.

It is an arithmetic number, because the mean of its divisors is an integer number (48608140344).

Almost surely, 2^668556916202 is an apocalyptic number.

668556916202 is a deficient number, since it is larger than the sum of its proper divisors (498038452054).

668556916202 is a wasteful number, since it uses less digits than its factorization.

668556916202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185802 (or 185795 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 56.

The spelling of 668556916202 in words is "six hundred sixty-eight billion, five hundred fifty-six million, nine hundred sixteen thousand, two hundred two".