67818 has 16 divisors (see below), whose sum is σ = 138240. Its totient is φ = 22176.

The previous prime is 67807. The next prime is 67819. The reversal of 67818 is 81876.

It is a super-2 number, since 2×67818² = 9198562248, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471 + ... + 597.

It is an arithmetic number, because the mean of its divisors is an integer number (8640).

2⁶⁷⁸¹⁸ is an apocalyptic number.

67818 is an abundant number, since it is smaller than the sum of its proper divisors (70422).

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 (69120).

67818 is a wasteful number, since it uses less digits than its factorization.

67818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221.

The product of its digits is 2688, while the sum is 30.

The square root of 67818 is about 260.4188933238. The cubic root of 67818 is about 40.7801037170.

It can be divided in two parts, 678 and 18, that added together give a palindrome (696).

The spelling of 67818 in words is "sixty-seven thousand, eight hundred eighteen".