166606043 has 4 divisors (see below), whose sum is σ = 173849808. Its totient is φ = 159362280.

The previous prime is 166606031. The next prime is 166606051. The reversal of 166606043 is 340606661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166606043 - 2⁸ = 166605787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166606243) 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 3 ways as a sum of consecutive naturals, for example, 3621848 + ... + 3621893.

It is an arithmetic number, because the mean of its divisors is an integer number (43462452).

Almost surely, 2^166606043 is an apocalyptic number.

166606043 is a deficient number, since it is larger than the sum of its proper divisors (7243765).

166606043 is an equidigital number, since it uses as much as digits as its factorization.

166606043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7243764.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 166606043 is about 12907.5963292938. The cubic root of 166606043 is about 550.2544750783.

The spelling of 166606043 in words is "one hundred sixty-six million, six hundred six thousand, forty-three".