678111 has 16 divisors (see below), whose sum is σ = 1056000. Its totient is φ = 386904.

The previous prime is 678103. The next prime is 678133. The reversal of 678111 is 111876.

It is not a de Polignac number, because 678111 - 2³ = 678103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 700 + ... + 1358.

It is an arithmetic number, because the mean of its divisors is an integer number (66000).

2⁶⁷⁸¹¹¹ is an apocalyptic number.

678111 is a deficient number, since it is larger than the sum of its proper divisors (377889).

678111 is an equidigital number, since it uses as much as digits as its factorization.

678111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 669 counting only the distinct ones).

The product of its digits is 336, while the sum is 24.

The square root of 678111 is about 823.4749540818. The cubic root of 678111 is about 87.8550903650.

Adding to 678111 its reverse (111876), we get a palindrome (789987).

The spelling of 678111 in words is "six hundred seventy-eight thousand, one hundred eleven".