666536064260 has 192 divisors, whose sum is σ = 1632450516480. Its totient is φ = 225921146880.

The previous prime is 666536064211. The next prime is 666536064307. The reversal of 666536064260 is 62460635666.

It is a junction number, because it is equal to n+sod(n) for n = 666536064199 and 666536064208.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 179222681 + ... + 179226399.

It is an arithmetic number, because the mean of its divisors is an integer number (8502346440).

Almost surely, 2^666536064260 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 666536064260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (816225258240).

666536064260 is an abundant number, since it is smaller than the sum of its proper divisors (965914452220).

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

666536064260 is a wasteful number, since it uses less digits than its factorization.

666536064260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4206 (or 4204 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 50.

The spelling of 666536064260 in words is "six hundred sixty-six billion, five hundred thirty-six million, sixty-four thousand, two hundred sixty".