66571628460754 has 8 divisors (see below), whose sum is σ = 102556292493708. Its totient is φ = 32386197629520.

The previous prime is 66571628460691. The next prime is 66571628460769. The reversal of 66571628460754 is 45706482617566.

66571628460754 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 56925168945129 + 9646459515625 = 7544877^2 + 3105875^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66571628460754.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449808300337 + ... + 449808300484.

Almost surely, 2^{66571628460754} is an apocalyptic number.

66571628460754 is a deficient number, since it is larger than the sum of its proper divisors (35984664032954).

66571628460754 is a wasteful number, since it uses less digits than its factorization.

66571628460754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899616600860.

The product of its (nonzero) digits is 406425600, while the sum is 67.

The spelling of 66571628460754 in words is "sixty-six trillion, five hundred seventy-one billion, six hundred twenty-eight million, four hundred sixty thousand, seven hundred fifty-four".