11663321 has 8 divisors (see below), whose sum is σ = 12394080. Its totient is φ = 10944288.

The previous prime is 11663303. The next prime is 11663329. The reversal of 11663321 is 12336611.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11663321 - 2⁶ = 11663257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11663329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 836 + ... + 4901.

It is an arithmetic number, because the mean of its divisors is an integer number (1549260).

Almost surely, 2^11663321 is an apocalyptic number.

It is an amenable number.

11663321 is a deficient number, since it is larger than the sum of its proper divisors (730759).

11663321 is a wasteful number, since it uses less digits than its factorization.

11663321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5863.

The product of its digits is 648, while the sum is 23.

The square root of 11663321 is about 3415.1604647513. The cubic root of 11663321 is about 226.7813882455.

Adding to 11663321 its reverse (12336611), we get a palindrome (23999932).

The spelling of 11663321 in words is "eleven million, six hundred sixty-three thousand, three hundred twenty-one".