198849966 has 16 divisors (see below), whose sum is σ = 454514304. Its totient is φ = 56814264.

The previous prime is 198849961. The next prime is 198849971. The reversal of 198849966 is 669948891.

It is an interprime number because it is at equal distance from previous prime (198849961) and next prime (198849971).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198849961) 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, 2367220 + ... + 2367303.

It is an arithmetic number, because the mean of its divisors is an integer number (28407144).

Almost surely, 2^198849966 is an apocalyptic number.

198849966 is an abundant number, since it is smaller than the sum of its proper divisors (255664338).

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

198849966 is a wasteful number, since it uses less digits than its factorization.

198849966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4734535.

The product of its digits is 6718464, while the sum is 60.

The square root of 198849966 is about 14101.4171628245. The cubic root of 198849966 is about 583.6804856798.

The spelling of 198849966 in words is "one hundred ninety-eight million, eight hundred forty-nine thousand, nine hundred sixty-six".