66700770080 has 96 divisors (see below), whose sum is σ = 180846328320. Its totient is φ = 22773058560.

The previous prime is 66700770079. The next prime is 66700770107. The reversal of 66700770080 is 8007700766.

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, 143090 + ... + 392270.

It is an arithmetic number, because the mean of its divisors is an integer number (1883815920).

Almost surely, 2^66700770080 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 66700770080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90423164160).

66700770080 is an abundant number, since it is smaller than the sum of its proper divisors (114145558240).

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

66700770080 is a wasteful number, since it uses less digits than its factorization.

66700770080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249442 (or 249434 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 41.

The spelling of 66700770080 in words is "sixty-six billion, seven hundred million, seven hundred seventy thousand, eighty".