198665080 has 32 divisors (see below), whose sum is σ = 462412800. Its totient is φ = 76725376.

The previous prime is 198665063. The next prime is 198665101. The reversal of 198665080 is 80566891.

It is a super-2 number, since 2×198665080² = 78935628022812800, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 84472 + ... + 86791.

It is an arithmetic number, because the mean of its divisors is an integer number (14450400).

Almost surely, 2^198665080 is an apocalyptic number.

198665080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198665080 is an abundant number, since it is smaller than the sum of its proper divisors (263747720).

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

198665080 is a wasteful number, since it uses less digits than its factorization.

198665080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171303 (or 171299 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 198665080 is about 14094.8600560630. The cubic root of 198665080 is about 583.4995321446.

The spelling of 198665080 in words is "one hundred ninety-eight million, six hundred sixty-five thousand, eighty".