678660 has 24 divisors (see below), whose sum is σ = 1900416. Its totient is φ = 180960.

The previous prime is 678659. The next prime is 678719. The reversal of 678660 is 66876.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5596 + ... + 5715.

It is an arithmetic number, because the mean of its divisors is an integer number (79184).

2⁶⁷⁸⁶⁶⁰ is an apocalyptic number.

678660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

678660 is an abundant number, since it is smaller than the sum of its proper divisors (1221756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678660 is a wasteful number, since it uses less digits than its factorization.

678660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11323 (or 11321 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 678660 is about 823.8082301118. The cubic root of 678660 is about 87.8787931875.

The spelling of 678660 in words is "six hundred seventy-eight thousand, six hundred sixty".