678064 has 10 divisors (see below), whose sum is σ = 1313780. Its totient is φ = 339024.

The previous prime is 678061. The next prime is 678077. The reversal of 678064 is 460876.

It is not an unprimeable number, because it can be changed into a prime (678061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21174 + ... + 21205.

It is an arithmetic number, because the mean of its divisors is an integer number (131378).

2⁶⁷⁸⁰⁶⁴ is an apocalyptic number.

It is an amenable number.

678064 is a deficient number, since it is larger than the sum of its proper divisors (635716).

678064 is a wasteful number, since it uses less digits than its factorization.

678064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42387 (or 42381 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 678064 is about 823.4464159859. The cubic root of 678064 is about 87.8530605672.

The spelling of 678064 in words is "six hundred seventy-eight thousand, sixty-four".