6687607971 has 16 divisors (see below), whose sum is σ = 9746565120. Its totient is φ = 4045122720.

The previous prime is 6687607967. The next prime is 6687607987. The reversal of 6687607971 is 1797067866.

It is not a de Polignac number, because 6687607971 - 2² = 6687607967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6687607961) 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 in 15 ways as a sum of consecutive naturals, for example, 182275 + ... + 215868.

It is an arithmetic number, because the mean of its divisors is an integer number (609160320).

Almost surely, 2^6687607971 is an apocalyptic number.

6687607971 is a deficient number, since it is larger than the sum of its proper divisors (3058957149).

6687607971 is a wasteful number, since it uses less digits than its factorization.

6687607971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398666.

The product of its (nonzero) digits is 5334336, while the sum is 57.

The square root of 6687607971 is about 81777.7963202727. The cubic root of 6687607971 is about 1884.0406501410.

The spelling of 6687607971 in words is "six billion, six hundred eighty-seven million, six hundred seven thousand, nine hundred seventy-one".