6661712808333 has 24 divisors (see below), whose sum is σ = 10498598547840. Its totient is φ = 4036880885760.

The previous prime is 6661712808293. The next prime is 6661712808347. The reversal of 6661712808333 is 3338082171666.

6661712808333 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6661712808333 - 2²⁰ = 6661711759757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6661712808333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661712808133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3568116 + ... + 5104397.

It is an arithmetic number, because the mean of its divisors is an integer number (437441606160).

Almost surely, 2^{6661712808333} is an apocalyptic number.

It is an amenable number.

6661712808333 is a deficient number, since it is larger than the sum of its proper divisors (3836885739507).

6661712808333 is a wasteful number, since it uses less digits than its factorization.

6661712808333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8680289 (or 8680286 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

Adding to 6661712808333 its reverse (3338082171666), we get a palindrome (9999794979999).

The spelling of 6661712808333 in words is "six trillion, six hundred sixty-one billion, seven hundred twelve million, eight hundred eight thousand, three hundred thirty-three".