66655471048 has 8 divisors (see below), whose sum is σ = 124979008230. Its totient is φ = 33327735520.

The previous prime is 66655471033. The next prime is 66655471049. The reversal of 66655471048 is 84017455666.

It can be written as a sum of positive squares in only one way, i.e., 50013955044 + 16641516004 = 223638^2 + 129002^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 66655470986 and 66655471004.

It is not an unprimeable number, because it can be changed into a prime (66655471049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4165966933 + ... + 4165966948.

Almost surely, 2^66655471048 is an apocalyptic number.

It is an amenable number.

66655471048 is a deficient number, since it is larger than the sum of its proper divisors (58323537182).

66655471048 is a wasteful number, since it uses less digits than its factorization.

66655471048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8331933887 (or 8331933883 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 66655471048 in words is "sixty-six billion, six hundred fifty-five million, four hundred seventy-one thousand, forty-eight".