6736878991 has 2 divisors, whose sum is σ = 6736878992. Its totient is φ = 6736878990.

The previous prime is 6736878989. The next prime is 6736879003. The reversal of 6736878991 is 1998786376.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6736878991 - 2¹ = 6736878989 is a prime.

Together with 6736878989, 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 (6736878931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3368439495 + 3368439496.

It is an arithmetic number, because the mean of its divisors is an integer number (3368439496).

Almost surely, 2^6736878991 is an apocalyptic number.

6736878991 is a deficient number, since it is larger than the sum of its proper divisors (1).

6736878991 is an equidigital number, since it uses as much as digits as its factorization.

6736878991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27433728, while the sum is 64.

The square root of 6736878991 is about 82078.4928650618. The cubic root of 6736878991 is about 1888.6562297624.

The spelling of 6736878991 in words is "six billion, seven hundred thirty-six million, eight hundred seventy-eight thousand, nine hundred ninety-one".