665462545264566 has 192 divisors, whose sum is σ = 1753976497029120. Its totient is φ = 178000903941120.

The previous prime is 665462545264519. The next prime is 665462545264567.

665462545264566 is a `hidden beast` number, since 6 + 6 + 5 + 4 + 6 + 2 + 5 + 4 + 52 + 6 + 4 + 566 = 666.

665462545264566 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 665462545264494 and 665462545264503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665462545264567) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9690838480 + ... + 9690907148.

It is an arithmetic number, because the mean of its divisors is an integer number (9135294255360).

Almost surely, 2^{665462545264566} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665462545264566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (876988248514560).

665462545264566 is an abundant number, since it is smaller than the sum of its proper divisors (1088513951764554).

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

665462545264566 is a wasteful number, since it uses less digits than its factorization.

665462545264566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92579 (or 92576 counting only the distinct ones).

The product of its digits is 7464960000, while the sum is 72.

The spelling of 665462545264566 in words is "six hundred sixty-five trillion, four hundred sixty-two billion, five hundred forty-five million, two hundred sixty-four thousand, five hundred sixty-six".