6997718412216 has 768 divisors, whose sum is σ = 24922235520000. Its totient is φ = 1794197164032.

The previous prime is 6997718412211. The next prime is 6997718412253. The reversal of 6997718412216 is 6122148177996.

6997718412216 is a `hidden beast` number, since 69 + 97 + 71 + 8 + 412 + 2 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6997718412211) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 397385620 + ... + 397403228.

It is an arithmetic number, because the mean of its divisors is an integer number (32450827500).

Almost surely, 2^{6997718412216} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6997718412216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12461117760000).

6997718412216 is an abundant number, since it is smaller than the sum of its proper divisors (17924517107784).

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

6997718412216 is a wasteful number, since it uses less digits than its factorization.

6997718412216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17738 (or 17722 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The spelling of 6997718412216 in words is "six trillion, nine hundred ninety-seven billion, seven hundred eighteen million, four hundred twelve thousand, two hundred sixteen".