166413943 has 2 divisors, whose sum is σ = 166413944. Its totient is φ = 166413942.

The previous prime is 166413941. The next prime is 166414009. The reversal of 166413943 is 349314661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166413943 - 2¹ = 166413941 is a prime.

Together with 166413941, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166413941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83206971 + 83206972.

It is an arithmetic number, because the mean of its divisors is an integer number (83206972).

Almost surely, 2^166413943 is an apocalyptic number.

166413943 is a deficient number, since it is larger than the sum of its proper divisors (1).

166413943 is an equidigital number, since it uses as much as digits as its factorization.

166413943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 37.

The square root of 166413943 is about 12900.1528285521. The cubic root of 166413943 is about 550.0429090490.

The spelling of 166413943 in words is "one hundred sixty-six million, four hundred thirteen thousand, nine hundred forty-three".