6993993996 has 72 divisors (see below), whose sum is σ = 19320869568. Its totient is φ = 2115612000.

The previous prime is 6993993971. The next prime is 6993993997.

6993993996 is a `hidden beast` number, since 69 + 93 + 99 + 399 + 6 = 666.

6993993996 is nontrivially palindromic in base 10.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (6993993997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 210651 + ... + 241581.

Almost surely, 2^6993993996 is an apocalyptic number.

6993993996 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6993993996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9660434784).

6993993996 is an abundant number, since it is smaller than the sum of its proper divisors (12326875572).

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

6993993996 is a wasteful number, since it uses less digits than its factorization.

6993993996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31523 (or 31518 counting only the distinct ones).

The product of its digits is 172186884, while the sum is 72.

The square root of 6993993996 is about 83630.1022120624. The cubic root of 6993993996 is about 1912.3839275448.

The spelling of 6993993996 in words is "six billion, nine hundred ninety-three million, nine hundred ninety-three thousand, nine hundred ninety-six".