6997861728 has 576 divisors, whose sum is σ = 25525785600. Its totient is φ = 1847577600.

The previous prime is 6997861723. The next prime is 6997861751. The reversal of 6997861728 is 8271687996.

6997861728 is a `hidden beast` number, since 6 + 9 + 9 + 7 + 8 + 617 + 2 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6997861723) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 25822233 + ... + 25822503.

It is an arithmetic number, because the mean of its divisors is an integer number (44315600).

Almost surely, 2^6997861728 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 6997861728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12762892800).

6997861728 is an abundant number, since it is smaller than the sum of its proper divisors (18527923872).

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

6997861728 is a wasteful number, since it uses less digits than its factorization.

6997861728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 319 counting only the distinct ones).

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

The square root of 6997861728 is about 83653.2230580508. The cubic root of 6997861728 is about 1912.7363835463.

The spelling of 6997861728 in words is "six billion, nine hundred ninety-seven million, eight hundred sixty-one thousand, seven hundred twenty-eight".