166543406 has 16 divisors (see below), whose sum is σ = 252972720. Its totient is φ = 82225920.

The previous prime is 166543393. The next prime is 166543423. The reversal of 166543406 is 604345661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53246 + ... + 56286.

It is an arithmetic number, because the mean of its divisors is an integer number (15810795).

Almost surely, 2^166543406 is an apocalyptic number.

166543406 is a deficient number, since it is larger than the sum of its proper divisors (86429314).

166543406 is a wasteful number, since it uses less digits than its factorization.

166543406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3379.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 166543406 is about 12905.1697392944. The cubic root of 166543406 is about 550.1855087728.

The spelling of 166543406 in words is "one hundred sixty-six million, five hundred forty-three thousand, four hundred six".