166081230641 has 2 divisors, whose sum is σ = 166081230642. Its totient is φ = 166081230640.

The previous prime is 166081230611. The next prime is 166081230671. The reversal of 166081230641 is 146032180661.

It is a balanced prime because it is at equal distance from previous prime (166081230611) and next prime (166081230671).

It can be written as a sum of positive squares in only one way, i.e., 109676880625 + 56404350016 = 331175^2 + 237496^2 .

It is a cyclic number.

It is not a de Polignac number, because 166081230641 - 2¹⁰ = 166081229617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166081230595 and 166081230604.

It is not a weakly prime, because it can be changed into another prime (166081230611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83040615320 + 83040615321.

It is an arithmetic number, because the mean of its divisors is an integer number (83040615321).

Almost surely, 2^166081230641 is an apocalyptic number.

It is an amenable number.

166081230641 is a deficient number, since it is larger than the sum of its proper divisors (1).

166081230641 is an equidigital number, since it uses as much as digits as its factorization.

166081230641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 166081230641 in words is "one hundred sixty-six billion, eighty-one million, two hundred thirty thousand, six hundred forty-one".