66546061326 has 32 divisors (see below), whose sum is σ = 151876901280. Its totient is φ = 21582505728.

The previous prime is 66546061321. The next prime is 66546061327. The reversal of 66546061326 is 62316064566.

66546061326 is a `hidden beast` number, since 6 + 6 + 5 + 4 + 6 + 0 + 613 + 26 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66546061321) by changing a digit.

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, 16651171 + ... + 16655166.

It is an arithmetic number, because the mean of its divisors is an integer number (4746153165).

Almost surely, 2^66546061326 is an apocalyptic number.

66546061326 is an abundant number, since it is smaller than the sum of its proper divisors (85330839954).

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

66546061326 is a wasteful number, since it uses less digits than its factorization.

66546061326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33306385 (or 33306379 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

The spelling of 66546061326 in words is "sixty-six billion, five hundred forty-six million, sixty-one thousand, three hundred twenty-six".