16155561066 has 16 divisors (see below), whose sum is σ = 32358857184. Its totient is φ = 5377231184.

The previous prime is 16155561047. The next prime is 16155561083. The reversal of 16155561066 is 66016555161.

16155561066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16155561066² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1984560 + ... + 1992683.

It is an arithmetic number, because the mean of its divisors is an integer number (2022428574).

Almost surely, 2^16155561066 is an apocalyptic number.

16155561066 is an abundant number, since it is smaller than the sum of its proper divisors (16203296118).

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

16155561066 is a wasteful number, since it uses less digits than its factorization.

16155561066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3977925.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 16155561066 in words is "sixteen billion, one hundred fifty-five million, five hundred sixty-one thousand, sixty-six".