6661133 has 4 divisors (see below), whose sum is σ = 6669180. Its totient is φ = 6653088.

The previous prime is 6661117. The next prime is 6661141. The reversal of 6661133 is 3311666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 619369 + 6041764 = 787^2 + 2458^2 .

It is a cyclic number.

It is not a de Polignac number, because 6661133 - 2⁴ = 6661117 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661103) 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, 2618 + ... + 4491.

It is an arithmetic number, because the mean of its divisors is an integer number (1667295).

Almost surely, 2^6661133 is an apocalyptic number.

It is an amenable number.

6661133 is a deficient number, since it is larger than the sum of its proper divisors (8047).

6661133 is an equidigital number, since it uses as much as digits as its factorization.

6661133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8046.

The product of its digits is 1944, while the sum is 26.

The square root of 6661133 is about 2580.9170850688. The cubic root of 6661133 is about 188.1551175646.

Adding to 6661133 its reverse (3311666), we get a palindrome (9972799).

The spelling of 6661133 in words is "six million, six hundred sixty-one thousand, one hundred thirty-three".