7993663997 has 12 divisors (see below), whose sum is σ = 8888034624. Its totient is φ = 7129827120.

The previous prime is 7993663991. The next prime is 7993664011.

7993663997 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7993663997 - 2²⁴ = 7976886781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7993663991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98453 + ... + 160250.

It is an arithmetic number, because the mean of its divisors is an integer number (740669552).

Almost surely, 2^7993663997 is an apocalyptic number.

It is an amenable number.

7993663997 is a deficient number, since it is larger than the sum of its proper divisors (894370627).

7993663997 is a wasteful number, since it uses less digits than its factorization.

7993663997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258820 (or 258767 counting only the distinct ones).

The product of its digits is 104162436, while the sum is 68.

The square root of 7993663997 is about 89407.2927506476. The cubic root of 7993663997 is about 1999.4718602965.

The spelling of 7993663997 in words is "seven billion, nine hundred ninety-three million, six hundred sixty-three thousand, nine hundred ninety-seven".