166662943 has 4 divisors (see below), whose sum is σ = 166891048. Its totient is φ = 166434840.

The previous prime is 166662929. The next prime is 166662953. The reversal of 166662943 is 349266661.

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 166662943 - 2¹³ = 166654751 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166662943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166662953) 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, 112953 + ... + 114418.

It is an arithmetic number, because the mean of its divisors is an integer number (41722762).

Almost surely, 2^166662943 is an apocalyptic number.

166662943 is a deficient number, since it is larger than the sum of its proper divisors (228105).

166662943 is an equidigital number, since it uses as much as digits as its factorization.

166662943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228104.

The product of its digits is 279936, while the sum is 43.

The square root of 166662943 is about 12909.8002695627. The cubic root of 166662943 is about 550.3171096931.

The spelling of 166662943 in words is "one hundred sixty-six million, six hundred sixty-two thousand, nine hundred forty-three".