66485458465 has 16 divisors (see below), whose sum is σ = 80894683008. Its totient is φ = 52447291776.

The previous prime is 66485458453. The next prime is 66485458607. The reversal of 66485458465 is 56485458466.

It is a cyclic number.

It is not a de Polignac number, because 66485458465 - 2¹⁷ = 66485327393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1704612 + ... + 1743178.

It is an arithmetic number, because the mean of its divisors is an integer number (5055917688).

Almost surely, 2^66485458465 is an apocalyptic number.

It is an amenable number.

66485458465 is a deficient number, since it is larger than the sum of its proper divisors (14409224543).

66485458465 is a wasteful number, since it uses less digits than its factorization.

66485458465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43368.

The product of its digits is 110592000, while the sum is 61.

Subtracting from 66485458465 its reverse (56485458466), we obtain a palindrome (9999999999).

The spelling of 66485458465 in words is "sixty-six billion, four hundred eighty-five million, four hundred fifty-eight thousand, four hundred sixty-five".