2668009987967 has 2 divisors, whose sum is σ = 2668009987968. Its totient is φ = 2668009987966.

The previous prime is 2668009987939. The next prime is 2668009988041. The reversal of 2668009987967 is 7697899008662.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2668009987967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2668009987927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334004993983 + 1334004993984.

It is an arithmetic number, because the mean of its divisors is an integer number (1334004993984).

Almost surely, 2^{2668009987967} is an apocalyptic number.

2668009987967 is a deficient number, since it is larger than the sum of its proper divisors (1).

2668009987967 is an equidigital number, since it uses as much as digits as its factorization.

2668009987967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987614208, while the sum is 77.

The spelling of 2668009987967 in words is "two trillion, six hundred sixty-eight billion, nine million, nine hundred eighty-seven thousand, nine hundred sixty-seven".