7999999068 has 12 divisors (see below), whose sum is σ = 18666664520. Its totient is φ = 2666666352.

The previous prime is 7999999061. The next prime is 7999999099. The reversal of 7999999068 is 8609999997.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7999999061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333333283 + ... + 333333306.

Almost surely, 2^7999999068 is an apocalyptic number.

It is an amenable number.

7999999068 is an abundant number, since it is smaller than the sum of its proper divisors (10666665452).

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

7999999068 is a wasteful number, since it uses less digits than its factorization.

7999999068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666666596 (or 666666594 counting only the distinct ones).

The product of its (nonzero) digits is 178564176, while the sum is 75.

The square root of 7999999068 is about 89442.7138899530. The cubic root of 7999999068 is about 1999.9999223333. Note that the first 4 decimals are identical.

The spelling of 7999999068 in words is "seven billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, sixty-eight".