6645326718 has 16 divisors (see below), whose sum is σ = 13719384576. Its totient is φ = 2143653720.

The previous prime is 6645326717. The next prime is 6645326759. The reversal of 6645326718 is 8176235466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645326711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17863596 + ... + 17863967.

It is an arithmetic number, because the mean of its divisors is an integer number (857461536).

Almost surely, 2^6645326718 is an apocalyptic number.

6645326718 is an abundant number, since it is smaller than the sum of its proper divisors (7074057858).

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

6645326718 is a wasteful number, since it uses less digits than its factorization.

6645326718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35727599.

The product of its digits is 1451520, while the sum is 48.

The square root of 6645326718 is about 81518.8733852474. The cubic root of 6645326718 is about 1880.0617451805.

The spelling of 6645326718 in words is "six billion, six hundred forty-five million, three hundred twenty-six thousand, seven hundred eighteen".