6646117816854 has 24 divisors (see below), whose sum is σ = 14441420284200. Its totient is φ = 2208988244448.

The previous prime is 6646117816817. The next prime is 6646117816907. The reversal of 6646117816854 is 4586187116466.

6646117816854 is a `hidden beast` number, since 6 + 6 + 4 + 611 + 7 + 8 + 1 + 6 + 8 + 5 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 6646117816791 and 6646117816800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 532023679 + ... + 532036170.

It is an arithmetic number, because the mean of its divisors is an integer number (601725845175).

Almost surely, 2^{6646117816854} is an apocalyptic number.

6646117816854 is an abundant number, since it is smaller than the sum of its proper divisors (7795302467346).

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

6646117816854 is a wasteful number, since it uses less digits than its factorization.

6646117816854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064060204 (or 1064060201 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 63.

The spelling of 6646117816854 in words is "six trillion, six hundred forty-six billion, one hundred seventeen million, eight hundred sixteen thousand, eight hundred fifty-four".