6998778996 has 96 divisors (see below), whose sum is σ = 18186094080. Its totient is φ = 2077046400.

The previous prime is 6998778959. The next prime is 6998779019.

It is a happy number.

6998778996 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1580866 + ... + 1585286.

It is an arithmetic number, because the mean of its divisors is an integer number (189438480).

Almost surely, 2^6998778996 is an apocalyptic number.

6998778996 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 6998778996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9093047040).

6998778996 is an abundant number, since it is smaller than the sum of its proper divisors (11187315084).

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

6998778996 is a wasteful number, since it uses less digits than its factorization.

6998778996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4685 (or 4683 counting only the distinct ones).

The product of its digits is 740710656, while the sum is 78.

The square root of 6998778996 is about 83658.7054406175. The cubic root of 6998778996 is about 1912.8199526560.

The spelling of 6998778996 in words is "six billion, nine hundred ninety-eight million, seven hundred seventy-eight thousand, nine hundred ninety-six".