66156616161105 has 64 divisors (see below), whose sum is σ = 112051997291520. Its totient is φ = 33273157881600.

The previous prime is 66156616161091. The next prime is 66156616161127. The reversal of 66156616161105 is 50116161665166.

66156616161105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66156616161105 - 2¹⁰ = 66156616160081 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 527624070 + ... + 527749440.

It is an arithmetic number, because the mean of its divisors is an integer number (1750812457680).

Almost surely, 2^{66156616161105} is an apocalyptic number.

It is an amenable number.

66156616161105 is a deficient number, since it is larger than the sum of its proper divisors (45895381130415).

66156616161105 is a wasteful number, since it uses less digits than its factorization.

66156616161105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153662.

The product of its (nonzero) digits is 1166400, while the sum is 51.

The spelling of 66156616161105 in words is "sixty-six trillion, one hundred fifty-six billion, six hundred sixteen million, one hundred sixty-one thousand, one hundred five".