660798 has 20 divisors (see below), whose sum is σ = 1481040. Its totient is φ = 220212.

The previous prime is 660791. The next prime is 660799. The reversal of 660798 is 897066.

660798 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660798.

It is not an unprimeable number, because it can be changed into a prime (660791) by changing a digit.

660798 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1878 + ... + 2201.

It is an arithmetic number, because the mean of its divisors is an integer number (74052).

2⁶⁶⁰⁷⁹⁸ is an apocalyptic number.

660798 is an abundant number, since it is smaller than the sum of its proper divisors (820242).

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

660798 is a wasteful number, since it uses less digits than its factorization.

660798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4093 (or 4084 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 660798 is about 812.8948271456. The cubic root of 660798 is about 87.1009529656.

The spelling of 660798 in words is "six hundred sixty thousand, seven hundred ninety-eight".