161065021067 has 2 divisors, whose sum is σ = 161065021068. Its totient is φ = 161065021066.

The previous prime is 161065021057. The next prime is 161065021081. The reversal of 161065021067 is 760120560161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161065021067 - 2⁸ = 161065020811 is a prime.

It is a super-2 number, since 2×161065021067² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161065021037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80532510533 + 80532510534.

It is an arithmetic number, because the mean of its divisors is an integer number (80532510534).

Almost surely, 2^161065021067 is an apocalyptic number.

161065021067 is a deficient number, since it is larger than the sum of its proper divisors (1).

161065021067 is an equidigital number, since it uses as much as digits as its factorization.

161065021067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 161065021067 in words is "one hundred sixty-one billion, sixty-five million, twenty-one thousand, sixty-seven".