66513102774080 has 112 divisors (see below), whose sum is σ = 159979313979264. Its totient is φ = 26337501665280.

The previous prime is 66513102774031. The next prime is 66513102774089. The reversal of 66513102774080 is 8047720131566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66513102774089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92026910 + ... + 92746850.

Almost surely, 2^{66513102774080} 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 66513102774080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79989656989632).

66513102774080 is an abundant number, since it is smaller than the sum of its proper divisors (93466211205184).

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

66513102774080 is a wasteful number, since it uses less digits than its factorization.

66513102774080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722864 (or 722854 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 66513102774080 in words is "sixty-six trillion, five hundred thirteen billion, one hundred two million, seven hundred seventy-four thousand, eighty".