6663223665121 has 8 divisors (see below), whose sum is σ = 6704437492224. Its totient is φ = 6622136846160.

The previous prime is 6663223665041. The next prime is 6663223665139. The reversal of 6663223665121 is 1215663223666.

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 6663223665121 - 2²¹ = 6663221567969 is a prime.

It is a super-2 number, since 2×6663223665121² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6663223665151) 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, 31646785 + ... + 31856638.

It is an arithmetic number, because the mean of its divisors is an integer number (838054686528).

Almost surely, 2^{6663223665121} is an apocalyptic number.

It is an amenable number.

6663223665121 is a deficient number, since it is larger than the sum of its proper divisors (41213827103).

6663223665121 is a wasteful number, since it uses less digits than its factorization.

6663223665121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63504071.

The product of its digits is 2799360, while the sum is 49.

Adding to 6663223665121 its reverse (1215663223666), we get a palindrome (7878886888787).

The spelling of 6663223665121 in words is "six trillion, six hundred sixty-three billion, two hundred twenty-three million, six hundred sixty-five thousand, one hundred twenty-one".