678800064 has 56 divisors (see below), whose sum is σ = 1837781440. Its totient is φ = 221001984.

The previous prime is 678800053. The next prime is 678800159. The reversal of 678800064 is 460008876.

It is a junction number, because it is equal to n+sod(n) for n = 678799995 and 678800031.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32854 + ... + 49365.

Almost surely, 2^678800064 is an apocalyptic number.

678800064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

678800064 is an abundant number, since it is smaller than the sum of its proper divisors (1158981376).

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

678800064 is a wasteful number, since it uses less digits than its factorization.

678800064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82277 (or 82267 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 678800064 is about 26053.7917393995. The cubic root of 678800064 is about 878.8483833955.

The spelling of 678800064 in words is "six hundred seventy-eight million, eight hundred thousand, sixty-four".