678622064 has 20 divisors (see below), whose sum is σ = 1317208104. Its totient is φ = 338697408.

The previous prime is 678622057. The next prime is 678622079. The reversal of 678622064 is 460226876.

678622064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29162 + ... + 46985.

Almost surely, 2^678622064 is an apocalyptic number.

It is an amenable number.

678622064 is a deficient number, since it is larger than the sum of its proper divisors (638586040).

678622064 is a wasteful number, since it uses less digits than its factorization.

678622064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76712 (or 76706 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 678622064 is about 26050.3755059308. The cubic root of 678622064 is about 878.7715572939.

The spelling of 678622064 in words is "six hundred seventy-eight million, six hundred twenty-two thousand, sixty-four".