166543703 has 2 divisors, whose sum is σ = 166543704. Its totient is φ = 166543702.

The previous prime is 166543693. The next prime is 166543717. The reversal of 166543703 is 307345661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166543703 - 2²² = 162349399 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166542703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83271851 + 83271852.

It is an arithmetic number, because the mean of its divisors is an integer number (83271852).

Almost surely, 2^166543703 is an apocalyptic number.

166543703 is a deficient number, since it is larger than the sum of its proper divisors (1).

166543703 is an equidigital number, since it uses as much as digits as its factorization.

166543703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 166543703 is about 12905.1812463057. The cubic root of 166543703 is about 550.1858358247.

The spelling of 166543703 in words is "one hundred sixty-six million, five hundred forty-three thousand, seven hundred three".