66589498542 has 96 divisors (see below), whose sum is σ = 164944110240. Its totient is φ = 17807247360.

The previous prime is 66589498529. The next prime is 66589498543. The reversal of 66589498542 is 24589498566.

It is a super-2 number, since 2×66589498542² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66589498543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 867834 + ... + 941442.

It is an arithmetic number, because the mean of its divisors is an integer number (1718167815).

Almost surely, 2^66589498542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66589498542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82472055120).

66589498542 is an abundant number, since it is smaller than the sum of its proper divisors (98354611698).

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

66589498542 is a wasteful number, since it uses less digits than its factorization.

66589498542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73826 (or 73819 counting only the distinct ones).

The product of its digits is 149299200, while the sum is 66.

The spelling of 66589498542 in words is "sixty-six billion, five hundred eighty-nine million, four hundred ninety-eight thousand, five hundred forty-two".