66798 has 16 divisors (see below), whose sum is σ = 148560. Its totient is φ = 22248.
The previous prime is 66797. The next prime is 66809. The reversal of 66798 is 89766.
It is a Curzon number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (66791) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 565 + ... + 672.
It is an arithmetic number, because the mean of its divisors is an integer number (9285).
266798 is an apocalyptic number.
66798 is an abundant number, since it is smaller than the sum of its proper divisors (81762).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74280).
66798 is a wasteful number, since it uses less digits than its factorization.
66798 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1248 (or 1242 counting only the distinct ones).
The product of its digits is 18144, while the sum is 36.
The square root of 66798 is about 258.4530905213. The cubic root of 66798 is about 40.5746223669.
The spelling of 66798 in words is "sixty-six thousand, seven hundred ninety-eight".
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