663371 has 2 divisors, whose sum is σ = 663372. Its totient is φ = 663370.

The previous prime is 663359. The next prime is 663407. The reversal of 663371 is 173366.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663371 is a prime.

It is a super-2 number, since 2×663371² = 880122167282, which contains 22 as substring.

It is a Chen prime.

It is equal to p₅₃₈₁₉ and since 663371 and 53819 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 663371.

It is not a weakly prime, because it can be changed into another prime (663301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331685 + 331686.

It is an arithmetic number, because the mean of its divisors is an integer number (331686).

2⁶⁶³³⁷¹ is an apocalyptic number.

663371 is a deficient number, since it is larger than the sum of its proper divisors (1).

663371 is an equidigital number, since it uses as much as digits as its factorization.

663371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 26.

The square root of 663371 is about 814.4759051071. The cubic root of 663371 is about 87.2138571110.

The spelling of 663371 in words is "six hundred sixty-three thousand, three hundred seventy-one".