6646087527664 has 40 divisors (see below), whose sum is σ = 13937709804480. Its totient is φ = 3051854308608.

The previous prime is 6646087527659. The next prime is 6646087527671. The reversal of 6646087527664 is 4667257806466.

It is a self number, because there is not a number n which added to its sum of digits gives 6646087527664.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81056344 + ... + 81138295.

It is an arithmetic number, because the mean of its divisors is an integer number (348442745112).

Almost surely, 2^{6646087527664} is an apocalyptic number.

It is an amenable number.

6646087527664 is an abundant number, since it is smaller than the sum of its proper divisors (7291622276816).

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

6646087527664 is a wasteful number, since it uses less digits than its factorization.

6646087527664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162194857 (or 162194851 counting only the distinct ones).

The product of its (nonzero) digits is 487710720, while the sum is 67.

The spelling of 6646087527664 in words is "six trillion, six hundred forty-six billion, eighty-seven million, five hundred twenty-seven thousand, six hundred sixty-four".