66130441615530 has 80 divisors (see below), whose sum is σ = 178738743828744. Its totient is φ = 17543412449280.

The previous prime is 66130441615507. The next prime is 66130441615531. The reversal of 66130441615530 is 3551614403166.

66130441615530 is a `hidden beast` number, since 6 + 6 + 1 + 30 + 4 + 4 + 1 + 61 + 553 + 0 = 666.

66130441615530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 49634716226481 + 16495725389049 = 7045191^2 + 4061493^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (66130441615531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 211352791 + ... + 211665450.

Almost surely, 2^{66130441615530} is an apocalyptic number.

66130441615530 is an abundant number, since it is smaller than the sum of its proper divisors (112608302213214).

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

66130441615530 is a wasteful number, since it uses less digits than its factorization.

66130441615530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423018453 (or 423018444 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 66130441615530 in words is "sixty-six trillion, one hundred thirty billion, four hundred forty-one million, six hundred fifteen thousand, five hundred thirty".