66570660747 has 6 divisors (see below), whose sum is σ = 96157621092. Its totient is φ = 44380440492.

The previous prime is 66570660733. The next prime is 66570660787. The reversal of 66570660747 is 74706607566.

66570660747 is a `hidden beast` number, since 6 + 6 + 570 + 6 + 60 + 7 + 4 + 7 = 666.

It is not a de Polignac number, because 66570660747 - 2⁴ = 66570660731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66570660693 and 66570660702.

It is not an unprimeable number, because it can be changed into a prime (66570660787) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3698370033 + ... + 3698370050.

It is an arithmetic number, because the mean of its divisors is an integer number (16026270182).

Almost surely, 2^66570660747 is an apocalyptic number.

66570660747 is a deficient number, since it is larger than the sum of its proper divisors (29586960345).

66570660747 is a wasteful number, since it uses less digits than its factorization.

66570660747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7396740089 (or 7396740086 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 54.

The spelling of 66570660747 in words is "sixty-six billion, five hundred seventy million, six hundred sixty thousand, seven hundred forty-seven".