1066663 has 4 divisors (see below), whose sum is σ = 1148728. Its totient is φ = 984600.

The previous prime is 1066651. The next prime is 1066669. The reversal of 1066663 is 3666601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3666601 = 19 ⋅192979.

It is a cyclic number.

It is not a de Polignac number, because 1066663 - 2¹⁷ = 935591 is a prime.

It is a super-2 number, since 2×1066663² = 2275539911138, which contains 22 as substring.

It is a Duffinian number.

1066663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41013 + ... + 41038.

It is an arithmetic number, because the mean of its divisors is an integer number (287182).

2^1066663 is an apocalyptic number.

1066663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1066663 is a deficient number, since it is larger than the sum of its proper divisors (82065).

1066663 is an equidigital number, since it uses as much as digits as its factorization.

1066663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82064.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 1066663 is about 1032.7937838698. The cubic root of 1066663 is about 102.1744739106.

The spelling of 1066663 in words is "one million, sixty-six thousand, six hundred sixty-three".