6690871268 has 12 divisors (see below), whose sum is σ = 11718033852. Its totient is φ = 3342861600.

The previous prime is 6690871259. The next prime is 6690871273. The reversal of 6690871268 is 8621780966.

It can be written as a sum of positive squares in 2 ways, for example, as 80856064 + 6610015204 = 8992^2 + 81302^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637655 + ... + 648062.

It is an arithmetic number, because the mean of its divisors is an integer number (976502821).

Almost surely, 2^6690871268 is an apocalyptic number.

It is an amenable number.

6690871268 is a deficient number, since it is larger than the sum of its proper divisors (5027162584).

6690871268 is a wasteful number, since it uses less digits than its factorization.

6690871268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287022 (or 1287020 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 6690871268 is about 81797.7461058677. The cubic root of 6690871268 is about 1884.3470469111.

The spelling of 6690871268 in words is "six billion, six hundred ninety million, eight hundred seventy-one thousand, two hundred sixty-eight".