678676 has 12 divisors (see below), whose sum is σ = 1193472. Its totient is φ = 337688.

The previous prime is 678659. The next prime is 678719. The reversal of 678676 is 676876.

It is a super-2 number, since 2×678676² = 921202225952, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

678676 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1311 + ... + 1753.

It is an arithmetic number, because the mean of its divisors is an integer number (99456).

2⁶⁷⁸⁶⁷⁶ is an apocalyptic number.

It is an amenable number.

678676 is a deficient number, since it is larger than the sum of its proper divisors (514796).

678676 is a wasteful number, since it uses less digits than its factorization.

678676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830 (or 828 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 678676 is about 823.8179410525. The cubic root of 678676 is about 87.8794837884.

The spelling of 678676 in words is "six hundred seventy-eight thousand, six hundred seventy-six".