663306173 has 2 divisors, whose sum is σ = 663306174. Its totient is φ = 663306172.

The previous prime is 663306167. The next prime is 663306197. The reversal of 663306173 is 371603366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 655257604 + 8048569 = 25598^2 + 2837^2 .

It is a cyclic number.

It is not a de Polignac number, because 663306173 - 2¹⁶ = 663240637 is a prime.

It is equal to p_34449083 and since 663306173 and 34449083 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663306103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331653086 + 331653087.

It is an arithmetic number, because the mean of its divisors is an integer number (331653087).

Almost surely, 2^663306173 is an apocalyptic number.

It is an amenable number.

663306173 is a deficient number, since it is larger than the sum of its proper divisors (1).

663306173 is an equidigital number, since it uses as much as digits as its factorization.

663306173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 35.

The square root of 663306173 is about 25754.7310799395. The cubic root of 663306173 is about 872.1101606787.

The spelling of 663306173 in words is "six hundred sixty-three million, three hundred six thousand, one hundred seventy-three".