6645332100329 has 16 divisors (see below), whose sum is σ = 7484004941952. Its totient is φ = 5854611235968.

The previous prime is 6645332100259. The next prime is 6645332100347. The reversal of 6645332100329 is 9230012335466.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6645332100329 - 2¹² = 6645332096233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6645332100329.

It is not an unprimeable number, because it can be changed into a prime (6645332100389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24179759 + ... + 24453044.

It is an arithmetic number, because the mean of its divisors is an integer number (467750308872).

Almost surely, 2^{6645332100329} is an apocalyptic number.

It is an amenable number.

6645332100329 is a deficient number, since it is larger than the sum of its proper divisors (838672841623).

6645332100329 is a wasteful number, since it uses less digits than its factorization.

6645332100329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48633296.

The product of its (nonzero) digits is 699840, while the sum is 44.

The spelling of 6645332100329 in words is "six trillion, six hundred forty-five billion, three hundred thirty-two million, one hundred thousand, three hundred twenty-nine".