6977887691 has 2 divisors, whose sum is σ = 6977887692. Its totient is φ = 6977887690.

The previous prime is 6977887663. The next prime is 6977887841. The reversal of 6977887691 is 1967887796.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6977887691 is a prime.

It is a super-2 number, since 2×6977887691² = 97381833256418622962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6977889691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3488943845 + 3488943846.

It is an arithmetic number, because the mean of its divisors is an integer number (3488943846).

Almost surely, 2^6977887691 is an apocalyptic number.

6977887691 is a deficient number, since it is larger than the sum of its proper divisors (1).

6977887691 is an equidigital number, since it uses as much as digits as its factorization.

6977887691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64012032, while the sum is 68.

The square root of 6977887691 is about 83533.7518072785. The cubic root of 6977887691 is about 1910.9148045087.

The spelling of 6977887691 in words is "six billion, nine hundred seventy-seven million, eight hundred eighty-seven thousand, six hundred ninety-one".