678889566790 has 32 divisors (see below), whose sum is σ = 1255095129600. Its totient is φ = 264202406784.

The previous prime is 678889566763. The next prime is 678889566799. The reversal of 678889566790 is 97665988876.

It is a self number, because there is not a number n which added to its sum of digits gives 678889566790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678889566799) 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, 9342939 + ... + 9415321.

It is an arithmetic number, because the mean of its divisors is an integer number (39221722800).

Almost surely, 2^678889566790 is an apocalyptic number.

678889566790 is a deficient number, since it is larger than the sum of its proper divisors (576205562810).

678889566790 is a wasteful number, since it uses less digits than its factorization.

678889566790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97776.

The product of its (nonzero) digits is 2194698240, while the sum is 79.

The spelling of 678889566790 in words is "six hundred seventy-eight billion, eight hundred eighty-nine million, five hundred sixty-six thousand, seven hundred ninety".