678661775396 has 24 divisors (see below), whose sum is σ = 1295758952544. Its totient is φ = 308451214080.

The previous prime is 678661775387. The next prime is 678661775401. The reversal of 678661775396 is 693577166876.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345485 + ... + 1215188.

It is an arithmetic number, because the mean of its divisors is an integer number (53989956356).

Almost surely, 2^678661775396 is an apocalyptic number.

It is an amenable number.

678661775396 is a deficient number, since it is larger than the sum of its proper divisors (617097177148).

678661775396 is a wasteful number, since it uses less digits than its factorization.

678661775396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570571 (or 1570569 counting only the distinct ones).

The product of its digits is 480090240, while the sum is 71.

The spelling of 678661775396 in words is "six hundred seventy-eight billion, six hundred sixty-one million, seven hundred seventy-five thousand, three hundred ninety-six".