166543026 has 16 divisors (see below), whose sum is σ = 358708224. Its totient is φ = 51243984.

The previous prime is 166543021. The next prime is 166543049. The reversal of 166543026 is 620345661.

It is not an unprimeable number, because it can be changed into a prime (166543021) 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, 1067506 + ... + 1067661.

It is an arithmetic number, because the mean of its divisors is an integer number (22419264).

Almost surely, 2^166543026 is an apocalyptic number.

166543026 is an abundant number, since it is smaller than the sum of its proper divisors (192165198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166543026 is a wasteful number, since it uses less digits than its factorization.

166543026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135185.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 166543026 is about 12905.1550165041. The cubic root of 166543026 is about 550.1850903220.

Adding to 166543026 its reverse (620345661), we get a palindrome (786888687).

The spelling of 166543026 in words is "one hundred sixty-six million, five hundred forty-three thousand, twenty-six".