663753 has 4 divisors (see below), whose sum is σ = 885008. Its totient is φ = 442500.

The previous prime is 663737. The next prime is 663763. The reversal of 663753 is 357366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 663753 - 2⁴ = 663737 is a prime.

It is a D-number.

It is a Duffinian number.

663753 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 663753.

It is not an unprimeable number, because it can be changed into a prime (663713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110623 + ... + 110628.

It is an arithmetic number, because the mean of its divisors is an integer number (221252).

2⁶⁶³⁷⁵³ is an apocalyptic number.

It is an amenable number.

663753 is a deficient number, since it is larger than the sum of its proper divisors (221255).

663753 is a wasteful number, since it uses less digits than its factorization.

663753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221254.

The product of its digits is 11340, while the sum is 30.

The square root of 663753 is about 814.7103779872. The cubic root of 663753 is about 87.2305945026.

The spelling of 663753 in words is "six hundred sixty-three thousand, seven hundred fifty-three".