66700000000 has 324 divisors, whose sum is σ = 179648345520. Its totient is φ = 24640000000.

The previous prime is 66699999991. The next prime is 66700000001. The reversal of 66700000000 is 766.

It is not an unprimeable number, because it can be changed into a prime (66700000001) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2299999986 + ... + 2300000014.

Almost surely, 2^66700000000 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 66700000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89824172760).

66700000000 is an abundant number, since it is smaller than the sum of its proper divisors (112948345520).

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

66700000000 is an frugal number, since it uses more digits than its factorization.

66700000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 19.

Adding to 66700000000 its reverse (766), we get a palindrome (66700000766).

The spelling of 66700000000 in words is "sixty-six billion, seven hundred million", and thus it is an aban number.