678806616 has 64 divisors (see below), whose sum is σ = 1820102400. Its totient is φ = 210307968.

The previous prime is 678806599. The next prime is 678806621. The reversal of 678806616 is 616608876.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 10125 + ... + 38211.

It is an arithmetic number, because the mean of its divisors is an integer number (28439100).

Almost surely, 2^678806616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678806616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (910051200).

678806616 is an abundant number, since it is smaller than the sum of its proper divisors (1141295784).

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

678806616 is a wasteful number, since it uses less digits than its factorization.

678806616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28168 (or 28164 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 678806616 is about 26053.9174789512. The cubic root of 678806616 is about 878.8512110303.

The spelling of 678806616 in words is "six hundred seventy-eight million, eight hundred six thousand, six hundred sixteen".