166161547986 has 64 divisors (see below), whose sum is σ = 384843571200. Its totient is φ = 46844755776.

The previous prime is 166161547973. The next prime is 166161548011. The reversal of 166161547986 is 689745161661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5655811 + ... + 5685113.

It is an arithmetic number, because the mean of its divisors is an integer number (6013180800).

Almost surely, 2^166161547986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166161547986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192421785600).

166161547986 is an abundant number, since it is smaller than the sum of its proper divisors (218682023214).

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

166161547986 is a wasteful number, since it uses less digits than its factorization.

166161547986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31103.

The product of its digits is 13063680, while the sum is 60.

The spelling of 166161547986 in words is "one hundred sixty-six billion, one hundred sixty-one million, five hundred forty-seven thousand, nine hundred eighty-six".