660198222 has 32 divisors (see below), whose sum is σ = 1468317600. Its totient is φ = 219884544.

The previous prime is 660198169. The next prime is 660198229. The reversal of 660198222 is 222891066.

It is a happy number.

It is a super-2 number, since 2×660198222² = 871723384663922568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660198229) 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, 71748 + ... + 80424.

It is an arithmetic number, because the mean of its divisors is an integer number (45884925).

Almost surely, 2^660198222 is an apocalyptic number.

660198222 is an abundant number, since it is smaller than the sum of its proper divisors (808119378).

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

660198222 is a wasteful number, since it uses less digits than its factorization.

660198222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10097 (or 10091 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 660198222 is about 25694.3227581503. The cubic root of 660198222 is about 870.7459238889.

The spelling of 660198222 in words is "six hundred sixty million, one hundred ninety-eight thousand, two hundred twenty-two".