166086839 has 2 divisors, whose sum is σ = 166086840. Its totient is φ = 166086838.

The previous prime is 166086797. The next prime is 166086911. The reversal of 166086839 is 938680661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166086839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166086793 and 166086802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166086439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83043419 + 83043420.

It is an arithmetic number, because the mean of its divisors is an integer number (83043420).

Almost surely, 2^166086839 is an apocalyptic number.

166086839 is a deficient number, since it is larger than the sum of its proper divisors (1).

166086839 is an equidigital number, since it uses as much as digits as its factorization.

166086839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 166086839 is about 12887.4682928805. The cubic root of 166086839 is about 549.6822837191.

The spelling of 166086839 in words is "one hundred sixty-six million, eighty-six thousand, eight hundred thirty-nine".