6621328231267 has 8 divisors (see below), whose sum is σ = 6729916678400. Its totient is φ = 6512741141760.

The previous prime is 6621328231207. The next prime is 6621328231363. The reversal of 6621328231267 is 7621328231266.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6621328231267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6621328231267.

It is not an unprimeable number, because it can be changed into a prime (6621328231207) 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, 15524734 + ... + 15945532.

It is an arithmetic number, because the mean of its divisors is an integer number (841239584800).

Almost surely, 2^{6621328231267} is an apocalyptic number.

6621328231267 is a deficient number, since it is larger than the sum of its proper divisors (108588447133).

6621328231267 is a wasteful number, since it uses less digits than its factorization.

6621328231267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678813.

The product of its digits is 1741824, while the sum is 49.

Subtracting 6621328231267 from its reverse (7621328231266), we obtain a palindrome (999999999999).

The spelling of 6621328231267 in words is "six trillion, six hundred twenty-one billion, three hundred twenty-eight million, two hundred thirty-one thousand, two hundred sixty-seven".