198068666 has 16 divisors (see below), whose sum is σ = 325428840. Its totient is φ = 89994240.

The previous prime is 198068639. The next prime is 198068671. The reversal of 198068666 is 666860891.

It can be written as a sum of positive squares in 4 ways, for example, as 197993041 + 75625 = 14071^2 + 275^2 .

It is a super-3 number, since 3×198068666³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99455 + ... + 101426.

Almost surely, 2^198068666 is an apocalyptic number.

198068666 is a deficient number, since it is larger than the sum of its proper divisors (127360174).

198068666 is a wasteful number, since it uses less digits than its factorization.

198068666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200929.

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 198068666 is about 14073.6870080303. The cubic root of 198068666 is about 582.9150373359.

The spelling of 198068666 in words is "one hundred ninety-eight million, sixty-eight thousand, six hundred sixty-six".