6912561668 has 12 divisors (see below), whose sum is σ = 12106290252. Its totient is φ = 3453621600.

The previous prime is 6912561661. The next prime is 6912561739. The reversal of 6912561668 is 8661652196.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 277155904 + 6635405764 = 16648^2 + 81458^2 .

It is not an unprimeable number, because it can be changed into a prime (6912561661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 658955 + ... + 669362.

It is an arithmetic number, because the mean of its divisors is an integer number (1008857521).

Almost surely, 2^6912561668 is an apocalyptic number.

It is an amenable number.

6912561668 is a deficient number, since it is larger than the sum of its proper divisors (5193728584).

6912561668 is a wasteful number, since it uses less digits than its factorization.

6912561668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329622 (or 1329620 counting only the distinct ones).

The product of its digits is 933120, while the sum is 50.

The square root of 6912561668 is about 83141.8166027180. The cubic root of 6912561668 is about 1904.9328577452.

The spelling of 6912561668 in words is "six billion, nine hundred twelve million, five hundred sixty-one thousand, six hundred sixty-eight".