1065663 has 16 divisors (see below), whose sum is σ = 1634400. Its totient is φ = 685440.

The previous prime is 1065643. The next prime is 1065667. The reversal of 1065663 is 3665601.

1065663 is a `hidden beast` number, since 1 + 0 + 656 + 6 + 3 = 666.

It is not a de Polignac number, because 1065663 - 2¹⁸ = 803519 is a prime.

It is a super-2 number, since 2×1065663² = 2271275259138, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103 + ... + 1463.

It is an arithmetic number, because the mean of its divisors is an integer number (102150).

2^1065663 is an apocalyptic number.

1065663 is a deficient number, since it is larger than the sum of its proper divisors (568737).

1065663 is a wasteful number, since it uses less digits than its factorization.

1065663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399 (or 1393 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 1065663 is about 1032.3095465993. The cubic root of 1065663 is about 102.1425342945.

It can be divided in two parts, 1065 and 663, that added together give a cube (1728 = 12³).

The spelling of 1065663 in words is "one million, sixty-five thousand, six hundred sixty-three".