678913566 has 8 divisors (see below), whose sum is σ = 1357827144. Its totient is φ = 226304520.

The previous prime is 678913561. The next prime is 678913579. The reversal of 678913566 is 665319876.

It is a sphenic number, since it is the product of 3 distinct primes.

678913566 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678913561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56576125 + ... + 56576136.

It is an arithmetic number, because the mean of its divisors is an integer number (169728393).

Almost surely, 2^678913566 is an apocalyptic number.

678913566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

678913566 is a wasteful number, since it uses less digits than its factorization.

678913566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113152266.

The product of its digits is 1632960, while the sum is 51.

The square root of 678913566 is about 26055.9698725647. The cubic root of 678913566 is about 878.8973646764.

The spelling of 678913566 in words is "six hundred seventy-eight million, nine hundred thirteen thousand, five hundred sixty-six".