166266543 has 8 divisors (see below), whose sum is σ = 225446400. Its totient is φ = 108965528.

The previous prime is 166266491. The next prime is 166266557. The reversal of 166266543 is 345662661.

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

It is a cyclic number.

It is not a de Polignac number, because 166266543 - 2¹⁷ = 166135471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166266343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469503 + ... + 469856.

It is an arithmetic number, because the mean of its divisors is an integer number (28180800).

Almost surely, 2^166266543 is an apocalyptic number.

166266543 is a deficient number, since it is larger than the sum of its proper divisors (59179857).

166266543 is an equidigital number, since it uses as much as digits as its factorization.

166266543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939421.

The product of its digits is 155520, while the sum is 39.

The square root of 166266543 is about 12894.4384522941. The cubic root of 166266543 is about 549.8804621756.

The spelling of 166266543 in words is "one hundred sixty-six million, two hundred sixty-six thousand, five hundred forty-three".