166443047 has 2 divisors, whose sum is σ = 166443048. Its totient is φ = 166443046.

The previous prime is 166443041. The next prime is 166443077. The reversal of 166443047 is 740344661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166443047 - 2⁴ = 166443031 is a prime.

It is a Chen prime.

It is equal to p_9315098 and since 166443047 and 9315098 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 166442998 and 166443016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166443041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83221523 + 83221524.

It is an arithmetic number, because the mean of its divisors is an integer number (83221524).

Almost surely, 2^166443047 is an apocalyptic number.

166443047 is a deficient number, since it is larger than the sum of its proper divisors (1).

166443047 is an equidigital number, since it uses as much as digits as its factorization.

166443047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 166443047 is about 12901.2808278868. The cubic root of 166443047 is about 550.0749726998.

It can be divided in two parts, 16644 and 3047, that added together give a palindrome (19691).

The spelling of 166443047 in words is "one hundred sixty-six million, four hundred forty-three thousand, forty-seven".