6566897901696 has 256 divisors, whose sum is σ = 19372171230720. Its totient is φ = 1954403942400.

The previous prime is 6566897901689. The next prime is 6566897901703. The reversal of 6566897901696 is 6961097986656.

It is an interprime number because it is at equal distance from previous prime (6566897901689) and next prime (6566897901703).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53613195 + ... + 53735541.

It is an arithmetic number, because the mean of its divisors is an integer number (75672543870).

Almost surely, 2^{6566897901696} is an apocalyptic number.

6566897901696 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6566897901696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9686085615360).

6566897901696 is an abundant number, since it is smaller than the sum of its proper divisors (12805273329024).

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

6566897901696 is a wasteful number, since it uses less digits than its factorization.

6566897901696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122603 (or 122591 counting only the distinct ones).

The product of its (nonzero) digits is 1587237120, while the sum is 78.

The spelling of 6566897901696 in words is "six trillion, five hundred sixty-six billion, eight hundred ninety-seven million, nine hundred one thousand, six hundred ninety-six".