166105556078 has 16 divisors (see below), whose sum is σ = 310638962304. Its totient is φ = 64716450360.

The previous prime is 166105556069. The next prime is 166105556093. The reversal of 166105556078 is 870655501661.

166105556078 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 539303600 + ... + 539303907.

It is an arithmetic number, because the mean of its divisors is an integer number (19414935144).

Almost surely, 2^166105556078 is an apocalyptic number.

166105556078 is a deficient number, since it is larger than the sum of its proper divisors (144533406226).

166105556078 is a wasteful number, since it uses less digits than its factorization.

166105556078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078607527.

The product of its (nonzero) digits is 1512000, while the sum is 50.

The spelling of 166105556078 in words is "one hundred sixty-six billion, one hundred five million, five hundred fifty-six thousand, seventy-eight".