678016 has 16 divisors (see below), whose sum is σ = 1350990. Its totient is φ = 338944.

The previous prime is 677983. The next prime is 678023. The reversal of 678016 is 610876.

It can be written as a sum of positive squares in only one way, i.e., 484416 + 193600 = 696^2 + 440^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2521 + ... + 2776.

2⁶⁷⁸⁰¹⁶ is an apocalyptic number.

It is an amenable number.

678016 is a deficient number, since it is larger than the sum of its proper divisors (672974).

678016 is an equidigital number, since it uses as much as digits as its factorization.

678016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5311 (or 5299 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 678016 is about 823.4172696756. The cubic root of 678016 is about 87.8509874854.

The spelling of 678016 in words is "six hundred seventy-eight thousand, sixteen".