66288755475 has 36 divisors (see below), whose sum is σ = 118749943416. Its totient is φ = 35348221440.

The previous prime is 66288755471. The next prime is 66288755521. The reversal of 66288755475 is 57455788266.

66288755475 is a `hidden beast` number, since 6 + 6 + 2 + 8 + 8 + 7 + 554 + 75 = 666.

It is not a de Polignac number, because 66288755475 - 2² = 66288755471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66288755471) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1596579 + ... + 1637571.

Almost surely, 2^66288755475 is an apocalyptic number.

66288755475 is a deficient number, since it is larger than the sum of its proper divisors (52461187941).

66288755475 is a wasteful number, since it uses less digits than its factorization.

66288755475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48196 (or 48188 counting only the distinct ones).

The product of its digits is 112896000, while the sum is 63.

The spelling of 66288755475 in words is "sixty-six billion, two hundred eighty-eight million, seven hundred fifty-five thousand, four hundred seventy-five".