678775 has 12 divisors (see below), whose sum is σ = 886600. Its totient is φ = 514080.

The previous prime is 678773. The next prime is 678779. The reversal of 678775 is 577876.

It is not a de Polignac number, because 678775 - 2¹ = 678773 is a prime.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240 + ... + 1189.

2⁶⁷⁸⁷⁷⁵ is an apocalyptic number.

678775 is a deficient number, since it is larger than the sum of its proper divisors (207825).

678775 is a wasteful number, since it uses less digits than its factorization.

678775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458 (or 1453 counting only the distinct ones).

The product of its digits is 82320, while the sum is 40.

The square root of 678775 is about 823.8780249527. The cubic root of 678775 is about 87.8837566402.

The spelling of 678775 in words is "six hundred seventy-eight thousand, seven hundred seventy-five".