663065 has 12 divisors (see below), whose sum is σ = 865452. Its totient is φ = 484800.

The previous prime is 663053. The next prime is 663071. The reversal of 663065 is 560366.

It can be written as a sum of positive squares in 6 ways, for example, as 65536 + 597529 = 256^2 + 773^2 .

It is not a de Polignac number, because 663065 - 2⁴ = 663049 is a prime.

It is a Duffinian number.

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, 6515 + ... + 6615.

It is an arithmetic number, because the mean of its divisors is an integer number (72121).

2⁶⁶³⁰⁶⁵ is an apocalyptic number.

663065 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

663065 is a deficient number, since it is larger than the sum of its proper divisors (202387).

663065 is a wasteful number, since it uses less digits than its factorization.

663065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 663065 is about 814.2880325782. The cubic root of 663065 is about 87.2004450360.

The spelling of 663065 in words is "six hundred sixty-three thousand, sixty-five".