166376543 has 2 divisors, whose sum is σ = 166376544. Its totient is φ = 166376542.

The previous prime is 166376533. The next prime is 166376557. The reversal of 166376543 is 345673661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166376543 - 2⁶ = 166376479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166376543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166376533) 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, 83188271 + 83188272.

It is an arithmetic number, because the mean of its divisors is an integer number (83188272).

Almost surely, 2^166376543 is an apocalyptic number.

166376543 is a deficient number, since it is larger than the sum of its proper divisors (1).

166376543 is an equidigital number, since it uses as much as digits as its factorization.

166376543 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 166376543 is about 12898.7031518676. The cubic root of 166376543 is about 550.0017002702.

The spelling of 166376543 in words is "one hundred sixty-six million, three hundred seventy-six thousand, five hundred forty-three".