161166559 has 2 divisors, whose sum is σ = 161166560. Its totient is φ = 161166558.

The previous prime is 161166547. The next prime is 161166571. The reversal of 161166559 is 955661161.

It is a balanced prime because it is at equal distance from previous prime (161166547) and next prime (161166571).

It is a cyclic number.

It is not a de Polignac number, because 161166559 - 2⁵ = 161166527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161166539) by changing a digit.

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 as a sum of consecutive naturals, namely, 80583279 + 80583280.

It is an arithmetic number, because the mean of its divisors is an integer number (80583280).

Almost surely, 2^161166559 is an apocalyptic number.

161166559 is a deficient number, since it is larger than the sum of its proper divisors (1).

161166559 is an equidigital number, since it uses as much as digits as its factorization.

161166559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 40.

The square root of 161166559 is about 12695.1391878939. The cubic root of 161166559 is about 544.1997164894.

The spelling of 161166559 in words is "one hundred sixty-one million, one hundred sixty-six thousand, five hundred fifty-nine".