660000198 has 32 divisors (see below), whose sum is σ = 1550771712. Its totient is φ = 184615200.

The previous prime is 660000151. The next prime is 660000239. The reversal of 660000198 is 891000066.

It is a super-2 number, since 2×660000198² = 871200522720078408, which contains 22 as substring.

660000198 is a modest number, since divided by 198 gives 66 as remainder.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383758 + ... + 385473.

It is an arithmetic number, because the mean of its divisors is an integer number (48461616).

Almost surely, 2^660000198 is an apocalyptic number.

660000198 is an abundant number, since it is smaller than the sum of its proper divisors (890771514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660000198 is a wasteful number, since it uses less digits than its factorization.

660000198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769260.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 660000198 is about 25690.4690108997. The cubic root of 660000198 is about 870.6588561832.

The spelling of 660000198 in words is "six hundred sixty million, one hundred ninety-eight", and thus it is an aban number.