6688147851 has 48 divisors (see below), whose sum is σ = 12568158720. Its totient is φ = 3323295360.

The previous prime is 6688147849. The next prime is 6688147853. The reversal of 6688147851 is 1587418866.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6688147849) and next prime (6688147853).

It is not a de Polignac number, because 6688147851 - 2¹ = 6688147849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6688147853) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 193866 + ... + 225743.

It is an arithmetic number, because the mean of its divisors is an integer number (261836640).

Almost surely, 2^6688147851 is an apocalyptic number.

6688147851 is a deficient number, since it is larger than the sum of its proper divisors (5880010869).

6688147851 is a wasteful number, since it uses less digits than its factorization.

6688147851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419656 (or 419653 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The square root of 6688147851 is about 81781.0971496470. The cubic root of 6688147851 is about 1884.0913473160.

The spelling of 6688147851 in words is "six billion, six hundred eighty-eight million, one hundred forty-seven thousand, eight hundred fifty-one".