6663316121 has 8 divisors (see below), whose sum is σ = 8307511104. Its totient is φ = 5192194320.

The previous prime is 6663316117. The next prime is 6663316123. The reversal of 6663316121 is 1216133666.

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 6663316121 - 2² = 6663316117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6663316123) 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, 43268210 + ... + 43268363.

It is an arithmetic number, because the mean of its divisors is an integer number (1038438888).

Almost surely, 2^6663316121 is an apocalyptic number.

It is an amenable number.

6663316121 is a deficient number, since it is larger than the sum of its proper divisors (1644194983).

6663316121 is a wasteful number, since it uses less digits than its factorization.

6663316121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86536591.

The product of its digits is 23328, while the sum is 35.

The square root of 6663316121 is about 81629.1376960458. The cubic root of 6663316121 is about 1881.7567065073.

Adding to 6663316121 its reverse (1216133666), we get a palindrome (7879449787).

The spelling of 6663316121 in words is "six billion, six hundred sixty-three million, three hundred sixteen thousand, one hundred twenty-one".