166003223 has 2 divisors, whose sum is σ = 166003224. Its totient is φ = 166003222.

The previous prime is 166003217. The next prime is 166003273. The reversal of 166003223 is 322300661.

It is a weak prime.

It is an emirp because it is prime and its reverse (322300661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166003223 - 2¹⁴ = 165986839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166003273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83001611 + 83001612.

It is an arithmetic number, because the mean of its divisors is an integer number (83001612).

Almost surely, 2^166003223 is an apocalyptic number.

166003223 is a deficient number, since it is larger than the sum of its proper divisors (1).

166003223 is an equidigital number, since it uses as much as digits as its factorization.

166003223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 166003223 is about 12884.2238027752. The cubic root of 166003223 is about 549.5900228483.

Adding to 166003223 its reverse (322300661), we get a palindrome (488303884).

The spelling of 166003223 in words is "one hundred sixty-six million, three thousand, two hundred twenty-three".