660198 has 32 divisors (see below), whose sum is σ = 1647360. Its totient is φ = 171360.

The previous prime is 660197. The next prime is 660199. The reversal of 660198 is 891066.

It is an interprime number because it is at equal distance from previous prime (660197) and next prime (660199).

It is a super-2 number, since 2×660198² = 871722798408, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

660198 is a modest number, since divided by 198 gives 66 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253 + ... + 1176.

It is an arithmetic number, because the mean of its divisors is an integer number (51480).

2⁶⁶⁰¹⁹⁸ is an apocalyptic number.

660198 is an abundant number, since it is smaller than the sum of its proper divisors (987162).

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

660198 is a wasteful number, since it uses less digits than its factorization.

660198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452.

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

The square root of 660198 is about 812.5256919015. The cubic root of 660198 is about 87.0745826289.

It can be divided in two parts, 660 and 198, that added together give a palindrome (858).

The spelling of 660198 in words is "six hundred sixty thousand, one hundred ninety-eight".