66118 has 8 divisors (see below), whose sum is σ = 106848. Its totient is φ = 30504.

The previous prime is 66109. The next prime is 66137. The reversal of 66118 is 81166.

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

It is an Ulam number.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1246 + ... + 1297.

It is an arithmetic number, because the mean of its divisors is an integer number (13356).

2⁶⁶¹¹⁸ is an apocalyptic number.

66118 is a deficient number, since it is larger than the sum of its proper divisors (40730).

66118 is a wasteful number, since it uses less digits than its factorization.

66118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558.

The product of its digits is 288, while the sum is 22.

The square root of 66118 is about 257.1342062037. The cubic root of 66118 is about 40.4364700250.

The spelling of 66118 in words is "sixty-six thousand, one hundred eighteen".