198456966666 has 48 divisors (see below), whose sum is σ = 491442120000. Its totient is φ = 56699121024.

The previous prime is 198456966593. The next prime is 198456966713. The reversal of 198456966666 is 666669654891.

It is a junction number, because it is equal to n+sod(n) for n = 198456966594 and 198456966603.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4540585 + ... + 4584083.

It is an arithmetic number, because the mean of its divisors is an integer number (10238377500).

Almost surely, 2^198456966666 is an apocalyptic number.

198456966666 is an abundant number, since it is smaller than the sum of its proper divisors (292985153334).

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

198456966666 is a wasteful number, since it uses less digits than its factorization.

198456966666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79723 (or 79720 counting only the distinct ones).

The product of its digits is 604661760, while the sum is 72.

The spelling of 198456966666 in words is "one hundred ninety-eight billion, four hundred fifty-six million, nine hundred sixty-six thousand, six hundred sixty-six".