680668198 has 32 divisors (see below), whose sum is σ = 1230301440. Its totient is φ = 275905440.

The previous prime is 680668181. The next prime is 680668201. The reversal of 680668198 is 891866086.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193233 + ... + 196723.

It is an arithmetic number, because the mean of its divisors is an integer number (38446920).

Almost surely, 2^680668198 is an apocalyptic number.

680668198 is a deficient number, since it is larger than the sum of its proper divisors (549633242).

680668198 is a wasteful number, since it uses less digits than its factorization.

680668198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4252.

The product of its (nonzero) digits is 995328, while the sum is 52.

The square root of 680668198 is about 26089.6185867099. The cubic root of 680668198 is about 879.6538747255.

The spelling of 680668198 in words is "six hundred eighty million, six hundred sixty-eight thousand, one hundred ninety-eight".