166504003 has 2 divisors, whose sum is σ = 166504004. Its totient is φ = 166504002.

The previous prime is 166503991. The next prime is 166504043. The reversal of 166504003 is 300405661.

166504003 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (300405661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166504003 - 2¹³ = 166495811 is a prime.

It is not a weakly prime, because it can be changed into another prime (166504043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83252001 + 83252002.

It is an arithmetic number, because the mean of its divisors is an integer number (83252002).

Almost surely, 2^166504003 is an apocalyptic number.

166504003 is a deficient number, since it is larger than the sum of its proper divisors (1).

166504003 is an equidigital number, since it uses as much as digits as its factorization.

166504003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 166504003 is about 12903.6430127309. The cubic root of 166504003 is about 550.1421153416.

Adding to 166504003 its reverse (300405661), we get a palindrome (466909664).

The spelling of 166504003 in words is "one hundred sixty-six million, five hundred four thousand, three".