663759 has 6 divisors (see below), whose sum is σ = 958776. Its totient is φ = 442500.

The previous prime is 663737. The next prime is 663763. The reversal of 663759 is 957366.

It is a happy number.

It is not a de Polignac number, because 663759 - 2⁷ = 663631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36867 + ... + 36884.

It is an arithmetic number, because the mean of its divisors is an integer number (159796).

663759 is a Friedman number, since it can be written as 9*(5^7-6*3^6), using all its digits and the basic arithmetic operations.

2⁶⁶³⁷⁵⁹ is an apocalyptic number.

663759 is a deficient number, since it is larger than the sum of its proper divisors (295017).

663759 is a wasteful number, since it uses less digits than its factorization.

663759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73757 (or 73754 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 663759 is about 814.7140602690. The cubic root of 663759 is about 87.2308573423.

The spelling of 663759 in words is "six hundred sixty-three thousand, seven hundred fifty-nine".