663775 has 12 divisors (see below), whose sum is σ = 940912. Its totient is φ = 455040.

The previous prime is 663763. The next prime is 663787. The reversal of 663775 is 577366.

663775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (663763) and next prime (663787).

It is not a de Polignac number, because 663775 - 2⁹ = 663263 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 663775.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1722 + ... + 2071.

2⁶⁶³⁷⁷⁵ is an apocalyptic number.

663775 is a deficient number, since it is larger than the sum of its proper divisors (277137).

663775 is a wasteful number, since it uses less digits than its factorization.

663775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3810 (or 3805 counting only the distinct ones).

The product of its digits is 26460, while the sum is 34.

The square root of 663775 is about 814.7238796058. The cubic root of 663775 is about 87.2315582405.

The spelling of 663775 in words is "six hundred sixty-three thousand, seven hundred seventy-five".