66880854272 has 144 divisors (see below), whose sum is σ = 144850202112. Its totient is φ = 30748999680.

The previous prime is 66880854251. The next prime is 66880854301. The reversal of 66880854272 is 27245808866.

It is a happy 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, 12623528 + ... + 12628824.

Almost surely, 2^66880854272 is an apocalyptic number.

66880854272 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66880854272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72425101056).

66880854272 is an abundant number, since it is smaller than the sum of its proper divisors (77969347840).

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

66880854272 is a wasteful number, since it uses less digits than its factorization.

66880854272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5424 (or 5410 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 56.

The spelling of 66880854272 in words is "sixty-six billion, eight hundred eighty million, eight hundred fifty-four thousand, two hundred seventy-two".