166075439 has 2 divisors, whose sum is σ = 166075440. Its totient is φ = 166075438.

The previous prime is 166075423. The next prime is 166075453. The reversal of 166075439 is 934570661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166075439 - 2⁴ = 166075423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166075396 and 166075405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166075139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83037719 + 83037720.

It is an arithmetic number, because the mean of its divisors is an integer number (83037720).

Almost surely, 2^166075439 is an apocalyptic number.

166075439 is a deficient number, since it is larger than the sum of its proper divisors (1).

166075439 is an equidigital number, since it uses as much as digits as its factorization.

166075439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 166075439 is about 12887.0259951627. The cubic root of 166075439 is about 549.6697069220.

The spelling of 166075439 in words is "one hundred sixty-six million, seventy-five thousand, four hundred thirty-nine".