84665662871 has 4 divisors (see below), whose sum is σ = 88346778672. Its totient is φ = 80984547072.

The previous prime is 84665662867. The next prime is 84665662919. The reversal of 84665662871 is 17826656648.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 84665662871 - 2² = 84665662867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84665662871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84665662801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1840557866 + ... + 1840557911.

It is an arithmetic number, because the mean of its divisors is an integer number (22086694668).

Almost surely, 2^84665662871 is an apocalyptic number.

84665662871 is a deficient number, since it is larger than the sum of its proper divisors (3681115801).

84665662871 is a wasteful number, since it uses less digits than its factorization.

84665662871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3681115800.

The product of its digits is 23224320, while the sum is 59.

The spelling of 84665662871 in words is "eighty-four billion, six hundred sixty-five million, six hundred sixty-two thousand, eight hundred seventy-one".