1326663 has 48 divisors (see below), whose sum is σ = 2358720. Its totient is φ = 709632.

The previous prime is 1326659. The next prime is 1326673. The reversal of 1326663 is 3666231.

It is not a de Polignac number, because 1326663 - 2² = 1326659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45733 + ... + 45761.

It is an arithmetic number, because the mean of its divisors is an integer number (49140).

2^1326663 is an apocalyptic number.

1326663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1326663 is a deficient number, since it is larger than the sum of its proper divisors (1032057).

1326663 is a wasteful number, since it uses less digits than its factorization.

1326663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 85 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 1326663 is about 1151.8085778462. The cubic root of 1326663 is about 109.8803934110.

The spelling of 1326663 in words is "one million, three hundred twenty-six thousand, six hundred sixty-three".