84661222171 has 4 divisors (see below), whose sum is σ = 86096158200. Its totient is φ = 83226286144.

The previous prime is 84661222141. The next prime is 84661222189. The reversal of 84661222171 is 17122216648.

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

It is a cyclic number.

It is not a de Polignac number, because 84661222171 - 2¹¹ = 84661220123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84661222111) 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, 717467926 + ... + 717468043.

It is an arithmetic number, because the mean of its divisors is an integer number (21524039550).

Almost surely, 2^84661222171 is an apocalyptic number.

84661222171 is a deficient number, since it is larger than the sum of its proper divisors (1434936029).

84661222171 is a wasteful number, since it uses less digits than its factorization.

84661222171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434936028.

The product of its digits is 64512, while the sum is 40.

The spelling of 84661222171 in words is "eighty-four billion, six hundred sixty-one million, two hundred twenty-two thousand, one hundred seventy-one".