1663326 has 48 divisors (see below), whose sum is σ = 4228224. Its totient is φ = 462672.

The previous prime is 1663309. The next prime is 1663327. The reversal of 1663326 is 6233661.

1663326 is a `hidden beast` number, since 1 + 6 + 633 + 26 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1663326.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663327) 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 23 ways as a sum of consecutive naturals, for example, 5265 + ... + 5571.

It is an arithmetic number, because the mean of its divisors is an integer number (88088).

2^1663326 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1663326, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2114112).

1663326 is an abundant number, since it is smaller than the sum of its proper divisors (2564898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1663326 is a wasteful number, since it uses less digits than its factorization.

1663326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 362 counting only the distinct ones).

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

The square root of 1663326 is about 1289.6999651082. The cubic root of 1663326 is about 118.4838411978.

Adding to 1663326 its reverse (6233661), we get a palindrome (7896987).

The spelling of 1663326 in words is "one million, six hundred sixty-three thousand, three hundred twenty-six".