166871039 has 2 divisors, whose sum is σ = 166871040. Its totient is φ = 166871038.

The previous prime is 166871011. The next prime is 166871041. The reversal of 166871039 is 930178661.

It is a strong prime.

It is an emirp because it is prime and its reverse (930178661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166871039 is a prime.

Together with 166871041, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 166870987 and 166871005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166871239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83435519 + 83435520.

It is an arithmetic number, because the mean of its divisors is an integer number (83435520).

Almost surely, 2^166871039 is an apocalyptic number.

166871039 is a deficient number, since it is larger than the sum of its proper divisors (1).

166871039 is an equidigital number, since it uses as much as digits as its factorization.

166871039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 166871039 is about 12917.8573687744. The cubic root of 166871039 is about 550.5460571271.

The spelling of 166871039 in words is "one hundred sixty-six million, eight hundred seventy-one thousand, thirty-nine".