161606111601066 has 32 divisors (see below), whose sum is σ = 355829970513600. Its totient is φ = 48522268702080.

The previous prime is 161606111601047. The next prime is 161606111601073. The reversal of 161606111601066 is 660106111606161.

It is a super-2 number, since 2×161606111601066² (a number of 29 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 11231999451 + ... + 11232013838.

It is an arithmetic number, because the mean of its divisors is an integer number (11119686578550).

Almost surely, 2^{161606111601066} is an apocalyptic number.

161606111601066 is an abundant number, since it is smaller than the sum of its proper divisors (194223858912534).

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

161606111601066 is a wasteful number, since it uses less digits than its factorization.

161606111601066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22464013414.

The product of its (nonzero) digits is 46656, while the sum is 42.

The spelling of 161606111601066 in words is "one hundred sixty-one trillion, six hundred six billion, one hundred eleven million, six hundred one thousand, sixty-six".