6491704966656 has 480 divisors, whose sum is σ = 21753482116608. Its totient is φ = 1684002078720.

The previous prime is 6491704966577. The next prime is 6491704966657. The reversal of 6491704966656 is 6566694071946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6491704966657) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 110813085 + ... + 110871651.

Almost surely, 2^{6491704966656} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6491704966656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10876741058304).

6491704966656 is an abundant number, since it is smaller than the sum of its proper divisors (15261777149952).

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

6491704966656 is a wasteful number, since it uses less digits than its factorization.

6491704966656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58682 (or 58653 counting only the distinct ones).

The product of its (nonzero) digits is 352719360, while the sum is 69.

The spelling of 6491704966656 in words is "six trillion, four hundred ninety-one billion, seven hundred four million, nine hundred sixty-six thousand, six hundred fifty-six".