9967568791 has 2 divisors, whose sum is σ = 9967568792. Its totient is φ = 9967568790.

The previous prime is 9967568789. The next prime is 9967568797. The reversal of 9967568791 is 1978657699.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9967568791 - 2¹ = 9967568789 is a prime.

Together with 9967568789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9967568797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4983784395 + 4983784396.

It is an arithmetic number, because the mean of its divisors is an integer number (4983784396).

Almost surely, 2^9967568791 is an apocalyptic number.

9967568791 is a deficient number, since it is larger than the sum of its proper divisors (1).

9967568791 is an equidigital number, since it uses as much as digits as its factorization.

9967568791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51438240, while the sum is 67.

The square root of 9967568791 is about 99837.7122684610. The cubic root of 9967568791 is about 2152.1031369860.

The spelling of 9967568791 in words is "nine billion, nine hundred sixty-seven million, five hundred sixty-eight thousand, seven hundred ninety-one".