678805887 has 8 divisors (see below), whose sum is σ = 905686704. Its totient is φ = 452231168.

The previous prime is 678805879. The next prime is 678805891. The reversal of 678805887 is 788508876.

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

It is a cyclic number.

It is not a de Polignac number, because 678805887 - 2³ = 678805879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678805847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71298 + ... + 80255.

It is an arithmetic number, because the mean of its divisors is an integer number (113210838).

Almost surely, 2^678805887 is an apocalyptic number.

678805887 is a deficient number, since it is larger than the sum of its proper divisors (226880817).

678805887 is a wasteful number, since it uses less digits than its factorization.

678805887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153049.

The product of its (nonzero) digits is 6021120, while the sum is 57.

The square root of 678805887 is about 26053.9034887289. The cubic root of 678805887 is about 878.8508964180.

The spelling of 678805887 in words is "six hundred seventy-eight million, eight hundred five thousand, eight hundred eighty-seven".