66366726340 has 48 divisors (see below), whose sum is σ = 144004492800. Its totient is φ = 25665603840.

The previous prime is 66366726331. The next prime is 66366726397. The reversal of 66366726340 is 4362766366.

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 15 ways as a sum of consecutive naturals, for example, 599359 + ... + 701401.

It is an arithmetic number, because the mean of its divisors is an integer number (3000093600).

Almost surely, 2^66366726340 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 66366726340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72002246400).

66366726340 is an abundant number, since it is smaller than the sum of its proper divisors (77637766460).

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

66366726340 is a wasteful number, since it uses less digits than its factorization.

66366726340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103132 (or 103130 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 49.

The spelling of 66366726340 in words is "sixty-six billion, three hundred sixty-six million, seven hundred twenty-six thousand, three hundred forty".