66260231554244 has 288 divisors, whose sum is σ = 150776210440800. Its totient is φ = 25224181678080.

The previous prime is 66260231554189. The next prime is 66260231554247. The reversal of 66260231554244 is 44245513206266.

It can be written as a sum of positive squares in 16 ways, for example, as 15117166086400 + 51143065467844 = 3888080^2 + 7151438^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66260231554192 and 66260231554201.

It is not an unprimeable number, because it can be changed into a prime (66260231554247) 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, 50159145104 + ... + 50159146424.

It is an arithmetic number, because the mean of its divisors is an integer number (523528508475).

Almost surely, 2^{66260231554244} 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 66260231554244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75388105220400).

66260231554244 is an abundant number, since it is smaller than the sum of its proper divisors (84515978886556).

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

66260231554244 is a wasteful number, since it uses less digits than its factorization.

66260231554244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143 (or 3134 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 50.

The spelling of 66260231554244 in words is "sixty-six trillion, two hundred sixty billion, two hundred thirty-one million, five hundred fifty-four thousand, two hundred forty-four".