678677 has 4 divisors (see below), whose sum is σ = 690240. Its totient is φ = 667116.

The previous prime is 678659. The next prime is 678719. The reversal of 678677 is 776876.

678677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 678677 - 2⁸ = 678421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 678677.

It is not an unprimeable number, because it can be changed into a prime (678607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5693 + ... + 5810.

It is an arithmetic number, because the mean of its divisors is an integer number (172560).

2⁶⁷⁸⁶⁷⁷ is an apocalyptic number.

It is an amenable number.

678677 is a deficient number, since it is larger than the sum of its proper divisors (11563).

678677 is a wasteful number, since it uses less digits than its factorization.

678677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11562.

The product of its digits is 98784, while the sum is 41.

The square root of 678677 is about 823.8185479825. The cubic root of 678677 is about 87.8795269506.

The spelling of 678677 in words is "six hundred seventy-eight thousand, six hundred seventy-seven".