66471443272 has 32 divisors (see below), whose sum is σ = 134449963200. Its totient is φ = 30626835264.

The previous prime is 66471443221. The next prime is 66471443279. The reversal of 66471443272 is 27234417466.

It is a happy number.

66471443272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66471443279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 483372 + ... + 605467.

It is an arithmetic number, because the mean of its divisors is an integer number (4201561350).

Almost surely, 2^66471443272 is an apocalyptic number.

It is an amenable number.

66471443272 is an abundant number, since it is smaller than the sum of its proper divisors (67978519928).

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

66471443272 is a wasteful number, since it uses less digits than its factorization.

66471443272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089445 (or 1089441 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 46.

The spelling of 66471443272 in words is "sixty-six billion, four hundred seventy-one million, four hundred forty-three thousand, two hundred seventy-two".