66018 has 8 divisors (see below), whose sum is σ = 132048. Its totient is φ = 22004.

The previous prime is 65993. The next prime is 66029. The reversal of 66018 is 81066.

It is a sphenic number, since it is the product of 3 distinct primes.

66018 is an admirable number.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 65985 and 66003.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5496 + ... + 5507.

It is an arithmetic number, because the mean of its divisors is an integer number (16506).

2⁶⁶⁰¹⁸ is an apocalyptic number.

66018 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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 (66024).

66018 is a wasteful number, since it uses less digits than its factorization.

66018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11008.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 66018 is about 256.9396816375. The cubic root of 66018 is about 40.4160737268.

The spelling of 66018 in words is "sixty-six thousand, eighteen".