66215065364 has 48 divisors (see below), whose sum is σ = 137443447680. Its totient is φ = 27309985920.

The previous prime is 66215065339. The next prime is 66215065373. The reversal of 66215065364 is 46356051266.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116474 + ... + 382094.

It is an arithmetic number, because the mean of its divisors is an integer number (2863405160).

Almost surely, 2^66215065364 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 66215065364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68721723840).

66215065364 is an abundant number, since it is smaller than the sum of its proper divisors (71228382316).

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

66215065364 is a wasteful number, since it uses less digits than its factorization.

66215065364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265968 (or 265966 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 66215065364 in words is "sixty-six billion, two hundred fifteen million, sixty-five thousand, three hundred sixty-four".