678770 has 16 divisors (see below), whose sum is σ = 1235520. Its totient is φ = 268464.

The previous prime is 678767. The next prime is 678773. The reversal of 678770 is 77876.

It is an interprime number because it is at equal distance from previous prime (678767) and next prime (678773).

It is a self number, because there is not a number n which added to its sum of digits gives 678770.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 678770.

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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 701 + ... + 1359.

It is an arithmetic number, because the mean of its divisors is an integer number (77220).

2⁶⁷⁸⁷⁷⁰ is an apocalyptic number.

678770 is a deficient number, since it is larger than the sum of its proper divisors (556750).

678770 is a wasteful number, since it uses less digits than its factorization.

678770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 678770 is about 823.8749905174. The cubic root of 678770 is about 87.8835408496.

The spelling of 678770 in words is "six hundred seventy-eight thousand, seven hundred seventy".