198552866 has 4 divisors (see below), whose sum is σ = 297829302. Its totient is φ = 99276432.

The previous prime is 198552857. The next prime is 198552883. The reversal of 198552866 is 668255891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 668255891 = 647 ⋅1032853.

It can be written as a sum of positive squares in only one way, i.e., 165662641 + 32890225 = 12871^2 + 5735^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49638215 + ... + 49638218.

Almost surely, 2^198552866 is an apocalyptic number.

198552866 is a deficient number, since it is larger than the sum of its proper divisors (99276436).

198552866 is an equidigital number, since it uses as much as digits as its factorization.

198552866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99276435.

The product of its digits is 1036800, while the sum is 50.

The square root of 198552866 is about 14090.8788228414. The cubic root of 198552866 is about 583.3896501456.

The spelling of 198552866 in words is "one hundred ninety-eight million, five hundred fifty-two thousand, eight hundred sixty-six".