42165554166 has 12 divisors (see below), whose sum is σ = 91358700732. Its totient is φ = 14055184716.

The previous prime is 42165554159. The next prime is 42165554279. The reversal of 42165554166 is 66145556124.

42165554166 is a `hidden beast` number, since 4 + 21 + 65 + 554 + 16 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1171265376 + ... + 1171265411.

It is an arithmetic number, because the mean of its divisors is an integer number (7613225061).

Almost surely, 2^42165554166 is an apocalyptic number.

42165554166 is an abundant number, since it is smaller than the sum of its proper divisors (49193146566).

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

42165554166 is a wasteful number, since it uses less digits than its factorization.

42165554166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342530795 (or 2342530792 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The spelling of 42165554166 in words is "forty-two billion, one hundred sixty-five million, five hundred fifty-four thousand, one hundred sixty-six".