198366668 has 6 divisors (see below), whose sum is σ = 347141676. Its totient is φ = 99183332.

The previous prime is 198366667. The next prime is 198366677. The reversal of 198366668 is 866663891.

It is not an unprimeable number, because it can be changed into a prime (198366667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24795830 + ... + 24795837.

It is an arithmetic number, because the mean of its divisors is an integer number (57856946).

Almost surely, 2^198366668 is an apocalyptic number.

It is an amenable number.

198366668 is a deficient number, since it is larger than the sum of its proper divisors (148775008).

198366668 is a wasteful number, since it uses less digits than its factorization.

198366668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49591671 (or 49591669 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 53.

The square root of 198366668 is about 14084.2702331360. The cubic root of 198366668 is about 583.2072302834.

The spelling of 198366668 in words is "one hundred ninety-eight million, three hundred sixty-six thousand, six hundred sixty-eight".