166845543 has 8 divisors (see below), whose sum is σ = 228473328. Its totient is φ = 108224064.

The previous prime is 166845533. The next prime is 166845563. The reversal of 166845543 is 345548661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166845543 - 2¹³ = 166837351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166845495 and 166845504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166845533) 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 in 7 ways as a sum of consecutive naturals, for example, 751446 + ... + 751667.

It is an arithmetic number, because the mean of its divisors is an integer number (28559166).

Almost surely, 2^166845543 is an apocalyptic number.

166845543 is a deficient number, since it is larger than the sum of its proper divisors (61627785).

166845543 is a wasteful number, since it uses less digits than its factorization.

166845543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503153.

The product of its digits is 345600, while the sum is 42.

The square root of 166845543 is about 12916.8704801124. The cubic root of 166845543 is about 550.5180166369.

The spelling of 166845543 in words is "one hundred sixty-six million, eight hundred forty-five thousand, five hundred forty-three".