166563743 has 2 divisors, whose sum is σ = 166563744. Its totient is φ = 166563742.

The previous prime is 166563737. The next prime is 166563763. The reversal of 166563743 is 347365661.

It is a weak prime.

It is an emirp because it is prime and its reverse (347365661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166563743 - 2¹⁶ = 166498207 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166563743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166563703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83281871 + 83281872.

It is an arithmetic number, because the mean of its divisors is an integer number (83281872).

Almost surely, 2^166563743 is an apocalyptic number.

166563743 is a deficient number, since it is larger than the sum of its proper divisors (1).

166563743 is an equidigital number, since it uses as much as digits as its factorization.

166563743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 41.

The square root of 166563743 is about 12905.9576552846. The cubic root of 166563743 is about 550.2079026691.

The spelling of 166563743 in words is "one hundred sixty-six million, five hundred sixty-three thousand, seven hundred forty-three".