678755 has 32 divisors (see below), whose sum is σ = 1064448. Its totient is φ = 403200.

The previous prime is 678749. The next prime is 678757. The reversal of 678755 is 557876.

It is not a de Polignac number, because 678755 - 2⁴ = 678739 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 678755.

It is not an unprimeable number, because it can be changed into a prime (678757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15764 + ... + 15806.

It is an arithmetic number, because the mean of its divisors is an integer number (33264).

2⁶⁷⁸⁷⁵⁵ is an apocalyptic number.

678755 is a deficient number, since it is larger than the sum of its proper divisors (385693).

678755 is a wasteful number, since it uses less digits than its factorization.

678755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107.

The product of its digits is 58800, while the sum is 38.

The square root of 678755 is about 823.8658871443. The cubic root of 678755 is about 87.8828934713.

The spelling of 678755 in words is "six hundred seventy-eight thousand, seven hundred fifty-five".