6977887663 has 2 divisors, whose sum is σ = 6977887664. Its totient is φ = 6977887662.

The previous prime is 6977887639. The next prime is 6977887691. The reversal of 6977887663 is 3667887796.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6977887663 - 2⁹ = 6977887151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6977887633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3488943831 + 3488943832.

It is an arithmetic number, because the mean of its divisors is an integer number (3488943832).

Almost surely, 2^6977887663 is an apocalyptic number.

6977887663 is a deficient number, since it is larger than the sum of its proper divisors (1).

6977887663 is an equidigital number, since it uses as much as digits as its factorization.

6977887663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128024064, while the sum is 67.

The square root of 6977887663 is about 83533.7516396815. The cubic root of 6977887663 is about 1910.9148019528.

The spelling of 6977887663 in words is "six billion, nine hundred seventy-seven million, eight hundred eighty-seven thousand, six hundred sixty-three".