66655470675 has 24 divisors (see below), whose sum is σ = 112766593984. Its totient is φ = 34722848160.

The previous prime is 66655470631. The next prime is 66655470683. The reversal of 66655470675 is 57607455666.

It is not a de Polignac number, because 66655470675 - 2¹⁷ = 66655339603 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 10330957 + ... + 10337406.

Almost surely, 2^66655470675 is an apocalyptic number.

66655470675 is a deficient number, since it is larger than the sum of its proper divisors (46111123309).

66655470675 is a wasteful number, since it uses less digits than its factorization.

66655470675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20668419 (or 20668414 counting only the distinct ones).

The product of its (nonzero) digits is 31752000, while the sum is 57.

The spelling of 66655470675 in words is "sixty-six billion, six hundred fifty-five million, four hundred seventy thousand, six hundred seventy-five".