66470565611 has 4 divisors (see below), whose sum is σ = 67155829272. Its totient is φ = 65785301952.

The previous prime is 66470565563. The next prime is 66470565631. The reversal of 66470565611 is 11656507466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66470565611 - 2³⁰ = 65396823787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66470565631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342631685 + ... + 342631878.

It is an arithmetic number, because the mean of its divisors is an integer number (16788957318).

Almost surely, 2^66470565611 is an apocalyptic number.

66470565611 is a deficient number, since it is larger than the sum of its proper divisors (685263661).

66470565611 is an equidigital number, since it uses as much as digits as its factorization.

66470565611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685263660.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 66470565611 in words is "sixty-six billion, four hundred seventy million, five hundred sixty-five thousand, six hundred eleven".