198666481 has 8 divisors (see below), whose sum is σ = 215634944. Its totient is φ = 181938960.

The previous prime is 198666473. The next prime is 198666487. The reversal of 198666481 is 184666891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198666481 - 2³ = 198666473 is a prime.

It is a super-2 number, since 2×198666481² = 78936741345846722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198666487) by changing a digit.

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, 58515 + ... + 61816.

It is an arithmetic number, because the mean of its divisors is an integer number (26954368).

Almost surely, 2^198666481 is an apocalyptic number.

It is an amenable number.

198666481 is a deficient number, since it is larger than the sum of its proper divisors (16968463).

198666481 is a wasteful number, since it uses less digits than its factorization.

198666481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120471.

The product of its digits is 497664, while the sum is 49.

The square root of 198666481 is about 14094.9097549434. The cubic root of 198666481 is about 583.5009037678.

The spelling of 198666481 in words is "one hundred ninety-eight million, six hundred sixty-six thousand, four hundred eighty-one".