6698738718 has 112 divisors (see below), whose sum is σ = 18230715360. Its totient is φ = 1801294848.

The previous prime is 6698738713. The next prime is 6698738723. The reversal of 6698738718 is 8178378966.

It is an interprime number because it is at equal distance from previous prime (6698738713) and next prime (6698738723).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6698738713) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 154198 + ... + 192806.

Almost surely, 2^6698738718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6698738718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9115357680).

6698738718 is an abundant number, since it is smaller than the sum of its proper divisors (11531976642).

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

6698738718 is a wasteful number, since it uses less digits than its factorization.

6698738718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38653 (or 38638 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The square root of 6698738718 is about 81845.8228500392. The cubic root of 6698738718 is about 1885.0853264126.

The spelling of 6698738718 in words is "six billion, six hundred ninety-eight million, seven hundred thirty-eight thousand, seven hundred eighteen".