11133661 has 8 divisors (see below), whose sum is σ = 13881024. Its totient is φ = 8675520.

The previous prime is 11133653. The next prime is 11133697. The reversal of 11133661 is 16633111.

It is a happy number.

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

It is not a de Polignac number, because 11133661 - 2³ = 11133653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11133961) 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, 72220 + ... + 72373.

It is an arithmetic number, because the mean of its divisors is an integer number (1735128).

Almost surely, 2^11133661 is an apocalyptic number.

11133661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11133661 is a deficient number, since it is larger than the sum of its proper divisors (2747363).

11133661 is a wasteful number, since it uses less digits than its factorization.

11133661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144611.

The product of its digits is 324, while the sum is 22.

The square root of 11133661 is about 3336.7141022269. The cubic root of 11133661 is about 223.2951710740.

Adding to 11133661 its reverse (16633111), we get a palindrome (27766772).

It can be divided in two parts, 1113 and 3661, that added together give a palindrome (4774).

The spelling of 11133661 in words is "eleven million, one hundred thirty-three thousand, six hundred sixty-one".