66971488224 has 48 divisors (see below), whose sum is σ = 176720624640. Its totient is φ = 22206944640.

The previous prime is 66971488223. The next prime is 66971488237. The reversal of 66971488224 is 42288417966.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66971488223) 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, 1807894 + ... + 1844565.

It is an arithmetic number, because the mean of its divisors is an integer number (3681679680).

Almost surely, 2^66971488224 is an apocalyptic number.

It is an amenable number.

66971488224 is an abundant number, since it is smaller than the sum of its proper divisors (109749136416).

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

66971488224 is a wasteful number, since it uses less digits than its factorization.

66971488224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3652663 (or 3652655 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 57.

The spelling of 66971488224 in words is "sixty-six billion, nine hundred seventy-one million, four hundred eighty-eight thousand, two hundred twenty-four".