66130422320544 has 192 divisors, whose sum is σ = 175827847716864. Its totient is φ = 21761313509376.

The previous prime is 66130422320537. The next prime is 66130422320569. The reversal of 66130422320544 is 44502322403166.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66130422320496 and 66130422320505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3276530677 + ... + 3276550859.

It is an arithmetic number, because the mean of its divisors is an integer number (915770040192).

Almost surely, 2^{66130422320544} 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 66130422320544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87913923858432).

66130422320544 is an abundant number, since it is smaller than the sum of its proper divisors (109697425396320).

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

66130422320544 is a wasteful number, since it uses less digits than its factorization.

66130422320544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21499 (or 21491 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 42.

The spelling of 66130422320544 in words is "sixty-six trillion, one hundred thirty billion, four hundred twenty-two million, three hundred twenty thousand, five hundred forty-four".