166303 has 2 divisors, whose sum is σ = 166304. Its totient is φ = 166302.

The previous prime is 166301. The next prime is 166319. The reversal of 166303 is 303661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166303 - 2¹ = 166301 is a prime.

Together with 166301, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83151 + 83152.

It is an arithmetic number, because the mean of its divisors is an integer number (83152).

2¹⁶⁶³⁰³ is an apocalyptic number.

166303 is a deficient number, since it is larger than the sum of its proper divisors (1).

166303 is an equidigital number, since it uses as much as digits as its factorization.

166303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 166303 is about 407.8026483484. The cubic root of 166303 is about 54.9920649709.

Adding to 166303 its reverse (303661), we get a palindrome (469964).

The spelling of 166303 in words is "one hundred sixty-six thousand, three hundred three".