6637772671688 has 8 divisors (see below), whose sum is σ = 12445823759430. Its totient is φ = 3318886335840.

The previous prime is 6637772671681. The next prime is 6637772671741. The reversal of 6637772671688 is 8861762777366.

It can be written as a sum of positive squares in only one way, i.e., 4165525885444 + 2472246786244 = 2040962^2 + 1572338^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (6637772671681) 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, 414860791973 + ... + 414860791988.

Almost surely, 2^{6637772671688} is an apocalyptic number.

It is an amenable number.

6637772671688 is a deficient number, since it is larger than the sum of its proper divisors (5808051087742).

6637772671688 is a wasteful number, since it uses less digits than its factorization.

6637772671688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829721583967 (or 829721583963 counting only the distinct ones).

The product of its digits is 1194891264, while the sum is 74.

The spelling of 6637772671688 in words is "six trillion, six hundred thirty-seven billion, seven hundred seventy-two million, six hundred seventy-one thousand, six hundred eighty-eight".