161065021066 has 8 divisors (see below), whose sum is σ = 241619654340. Its totient is φ = 80525136288.

The previous prime is 161065021057. The next prime is 161065021067. The reversal of 161065021066 is 660120560161.

It is a happy number.

161065021066 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 128239191025 + 32825830041 = 358105^2 + 181179^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (161065021067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3659781 + ... + 3703528.

Almost surely, 2^161065021066 is an apocalyptic number.

161065021066 is a deficient number, since it is larger than the sum of its proper divisors (80554633274).

161065021066 is a wasteful number, since it uses less digits than its factorization.

161065021066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7374248.

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 161065021066 in words is "one hundred sixty-one billion, sixty-five million, twenty-one thousand, sixty-six".