663041 has 4 divisors (see below), whose sum is σ = 667584. Its totient is φ = 658500.

The previous prime is 663037. The next prime is 663049. The reversal of 663041 is 140366.

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, and also an emirpimes, since its reverse is a distinct semiprime: 140366 = 2 ⋅70183.

It is a cyclic number.

It is not a de Polignac number, because 663041 - 2² = 663037 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 (663049) 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, 2045 + ... + 2346.

It is an arithmetic number, because the mean of its divisors is an integer number (166896).

2⁶⁶³⁰⁴¹ is an apocalyptic number.

It is an amenable number.

663041 is a deficient number, since it is larger than the sum of its proper divisors (4543).

663041 is a wasteful number, since it uses less digits than its factorization.

663041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4542.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 663041 is about 814.2732956447. The cubic root of 663041 is about 87.1993929341.

The spelling of 663041 in words is "six hundred sixty-three thousand, forty-one".