161105500666 has 16 divisors (see below), whose sum is σ = 263945219040. Its totient is φ = 73141429680.

The previous prime is 161105500657. The next prime is 161105500729. The reversal of 161105500666 is 666005501161.

161105500666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 4398516 + ... + 4434991.

It is an arithmetic number, because the mean of its divisors is an integer number (16496576190).

Almost surely, 2^161105500666 is an apocalyptic number.

161105500666 is a deficient number, since it is larger than the sum of its proper divisors (102839718374).

161105500666 is a wasteful number, since it uses less digits than its factorization.

161105500666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8834349.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 161105500666 in words is "one hundred sixty-one billion, one hundred five million, five hundred thousand, six hundred sixty-six".