678625 has 16 divisors (see below), whose sum is σ = 870480. Its totient is φ = 528000.

The previous prime is 678611. The next prime is 678631. The reversal of 678625 is 526876.

678625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 524176 + 154449 = 724^2 + 393^2 .

It is not a de Polignac number, because 678625 - 2⁵ = 678593 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7581 + ... + 7669.

It is an arithmetic number, because the mean of its divisors is an integer number (54405).

2⁶⁷⁸⁶²⁵ is an apocalyptic number.

It is an amenable number.

678625 is a deficient number, since it is larger than the sum of its proper divisors (191855).

678625 is an equidigital number, since it uses as much as digits as its factorization.

678625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 155 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 678625 is about 823.7869870300. The cubic root of 678625 is about 87.8772824602.

The spelling of 678625 in words is "six hundred seventy-eight thousand, six hundred twenty-five".