161066071007161 has 4 divisors (see below), whose sum is σ = 161066570822800. Its totient is φ = 161065571191524.

The previous prime is 161066071007131. The next prime is 161066071007239. The reversal of 161066071007161 is 161700170660161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161066071007161 - 2⁷ = 161066071007033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161066071007131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249424131 + ... + 250069048.

It is an arithmetic number, because the mean of its divisors is an integer number (40266642705700).

Almost surely, 2^{161066071007161} is an apocalyptic number.

It is an amenable number.

161066071007161 is a deficient number, since it is larger than the sum of its proper divisors (499815639).

161066071007161 is an equidigital number, since it uses as much as digits as its factorization.

161066071007161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499815638.

The product of its (nonzero) digits is 63504, while the sum is 43.

The spelling of 161066071007161 in words is "one hundred sixty-one trillion, sixty-six billion, seventy-one million, seven thousand, one hundred sixty-one".