6645512366120 has 32 divisors (see below), whose sum is σ = 15163000053120. Its totient is φ = 2620765439040.

The previous prime is 6645512366083. The next prime is 6645512366167. The reversal of 6645512366120 is 216632155466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1169981732 + ... + 1169987411.

It is an arithmetic number, because the mean of its divisors is an integer number (473843751660).

Almost surely, 2^{6645512366120} is an apocalyptic number.

It is an amenable number.

6645512366120 is an abundant number, since it is smaller than the sum of its proper divisors (8517487687000).

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

6645512366120 is a wasteful number, since it uses less digits than its factorization.

6645512366120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339969225 (or 2339969221 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 6645512366120 in words is "six trillion, six hundred forty-five billion, five hundred twelve million, three hundred sixty-six thousand, one hundred twenty".