7997667996 has 24 divisors (see below), whose sum is σ = 18664836624. Its totient is φ = 2665373440.

The previous prime is 7997667989. The next prime is 7997668033. The reversal of 7997667996 is 6997667997.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2926 + ... + 126506.

It is an arithmetic number, because the mean of its divisors is an integer number (777701526).

Almost surely, 2^7997667996 is an apocalyptic number.

It is an amenable number.

7997667996 is an abundant number, since it is smaller than the sum of its proper divisors (10667168628).

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

7997667996 is a wasteful number, since it uses less digits than its factorization.

7997667996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128981 (or 128979 counting only the distinct ones).

The product of its digits is 486091368, while the sum is 75.

The square root of 7997667996 is about 89429.6818511617. The cubic root of 7997667996 is about 1999.8056474475.

Subtracting from 7997667996 its reverse (6997667997), we obtain a palindrome (999999999).

The spelling of 7997667996 in words is "seven billion, nine hundred ninety-seven million, six hundred sixty-seven thousand, nine hundred ninety-six".