6697040688 has 160 divisors (see below), whose sum is σ = 20861998080. Its totient is φ = 2044673280.

The previous prime is 6697040681. The next prime is 6697040689. The reversal of 6697040688 is 8860407966.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (6697040681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 731145 + ... + 740247.

It is an arithmetic number, because the mean of its divisors is an integer number (130387488).

Almost surely, 2^6697040688 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 6697040688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10430999040).

6697040688 is an abundant number, since it is smaller than the sum of its proper divisors (14164957392).

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

6697040688 is a wasteful number, since it uses less digits than its factorization.

6697040688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9264 (or 9252 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The square root of 6697040688 is about 81835.4488470614. The cubic root of 6697040688 is about 1884.9260326474.

The spelling of 6697040688 in words is "six billion, six hundred ninety-seven million, forty thousand, six hundred eighty-eight".