84189716566 has 8 divisors (see below), whose sum is σ = 132931131480. Its totient is φ = 39879339408.

The previous prime is 84189716549. The next prime is 84189716587. The reversal of 84189716566 is 66561798148.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1107759391 + ... + 1107759466.

It is an arithmetic number, because the mean of its divisors is an integer number (16616391435).

Almost surely, 2^84189716566 is an apocalyptic number.

84189716566 is a deficient number, since it is larger than the sum of its proper divisors (48741414914).

84189716566 is a wasteful number, since it uses less digits than its factorization.

84189716566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215518878.

The product of its digits is 17418240, while the sum is 61.

The spelling of 84189716566 in words is "eighty-four billion, one hundred eighty-nine million, seven hundred sixteen thousand, five hundred sixty-six".