678576660839 has 16 divisors (see below), whose sum is σ = 895783401216. Its totient is φ = 497657443200.

The previous prime is 678576660823. The next prime is 678576660857. The reversal of 678576660839 is 938066675876.

It is a cyclic number.

It is not a de Polignac number, because 678576660839 - 2⁴ = 678576660823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678576660439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259195277 + ... + 259197894.

It is an arithmetic number, because the mean of its divisors is an integer number (55986462576).

Almost surely, 2^678576660839 is an apocalyptic number.

678576660839 is a deficient number, since it is larger than the sum of its proper divisors (217206740377).

678576660839 is a wasteful number, since it uses less digits than its factorization.

678576660839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518393206.

The product of its (nonzero) digits is 548674560, while the sum is 71.

The spelling of 678576660839 in words is "six hundred seventy-eight billion, five hundred seventy-six million, six hundred sixty thousand, eight hundred thirty-nine".