166829081 has 2 divisors, whose sum is σ = 166829082. Its totient is φ = 166829080.

The previous prime is 166829077. The next prime is 166829149. The reversal of 166829081 is 180928661.

166829081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160782400 + 6046681 = 12680^2 + 2459^2 .

It is a cyclic number.

It is not a de Polignac number, because 166829081 - 2² = 166829077 is a prime.

It is a super-2 number, since 2×166829081² = 55663884534609122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (166829071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83414540 + 83414541.

It is an arithmetic number, because the mean of its divisors is an integer number (83414541).

Almost surely, 2^166829081 is an apocalyptic number.

It is an amenable number.

166829081 is a deficient number, since it is larger than the sum of its proper divisors (1).

166829081 is an equidigital number, since it uses as much as digits as its factorization.

166829081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 166829081 is about 12916.2332357387. The cubic root of 166829081 is about 550.4999102184.

The spelling of 166829081 in words is "one hundred sixty-six million, eight hundred twenty-nine thousand, eighty-one".