198166827 has 16 divisors (see below), whose sum is σ = 290223360. Its totient is φ = 119715552.

The previous prime is 198166823. The next prime is 198166847. The reversal of 198166827 is 728661891.

It is not a de Polignac number, because 198166827 - 2² = 198166823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198166823) 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 15 ways as a sum of consecutive naturals, for example, 74268 + ... + 76889.

It is an arithmetic number, because the mean of its divisors is an integer number (18138960).

Almost surely, 2^198166827 is an apocalyptic number.

198166827 is a deficient number, since it is larger than the sum of its proper divisors (92056533).

198166827 is a wasteful number, since it uses less digits than its factorization.

198166827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151202.

The product of its digits is 290304, while the sum is 48.

The square root of 198166827 is about 14077.1739706519. The cubic root of 198166827 is about 583.0113172006.

The spelling of 198166827 in words is "one hundred ninety-eight million, one hundred sixty-six thousand, eight hundred twenty-seven".