663373 has 4 divisors (see below), whose sum is σ = 681340. Its totient is φ = 645408.

The previous prime is 663371. The next prime is 663407. The reversal of 663373 is 373366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 492804 + 170569 = 702^2 + 413^2 .

It is a cyclic number.

It is not a de Polignac number, because 663373 - 2¹ = 663371 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663371) 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 in 3 ways as a sum of consecutive naturals, for example, 8928 + ... + 9001.

It is an arithmetic number, because the mean of its divisors is an integer number (170335).

2⁶⁶³³⁷³ is an apocalyptic number.

It is an amenable number.

663373 is a deficient number, since it is larger than the sum of its proper divisors (17967).

663373 is a wasteful number, since it uses less digits than its factorization.

663373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17966.

The product of its digits is 6804, while the sum is 28.

The square root of 663373 is about 814.4771328896. The cubic root of 663373 is about 87.2139447581.

The spelling of 663373 in words is "six hundred sixty-three thousand, three hundred seventy-three".