7905538668 has 18 divisors (see below), whose sum is σ = 18446975596. Its totient is φ = 2635076888.

The previous prime is 7905538651. The next prime is 7905538741. The reversal of 7905538668 is 8668355097.

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 5 ways as a sum of consecutive naturals, for example, 295171 + ... + 320837.

Almost surely, 2^7905538668 is an apocalyptic number.

It is an amenable number.

7905538668 is an abundant number, since it is smaller than the sum of its proper divisors (10541436928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7905538668 is an frugal number, since it uses more digits than its factorization.

7905538668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51341 (or 25672 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 57.

The square root of 7905538668 is about 88913.0961557407. The cubic root of 7905538668 is about 1992.0970350386.

The spelling of 7905538668 in words is "seven billion, nine hundred five million, five hundred thirty-eight thousand, six hundred sixty-eight".