6566266555340 has 96 divisors (see below), whose sum is σ = 14317817665536. Its totient is φ = 2527657332480.

The previous prime is 6566266555307. The next prime is 6566266555349. The reversal of 6566266555340 is 435556626656.

It is a self number, because there is not a number n which added to its sum of digits gives 6566266555340.

It is not an unprimeable number, because it can be changed into a prime (6566266555349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96624014 + ... + 96691946.

It is an arithmetic number, because the mean of its divisors is an integer number (149143934016).

Almost surely, 2^{6566266555340} 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 6566266555340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7158908832768).

6566266555340 is an abundant number, since it is smaller than the sum of its proper divisors (7751551110196).

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

6566266555340 is a wasteful number, since it uses less digits than its factorization.

6566266555340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69639 (or 69637 counting only the distinct ones).

The product of its (nonzero) digits is 116640000, while the sum is 59.

The spelling of 6566266555340 in words is "six trillion, five hundred sixty-six billion, two hundred sixty-six million, five hundred fifty-five thousand, three hundred forty".