66447312266 has 16 divisors (see below), whose sum is σ = 102893809920. Its totient is φ = 32149535040.

The previous prime is 66447312263. The next prime is 66447312307. The reversal of 66447312266 is 66221374466.

It is a self number, because there is not a number n which added to its sum of digits gives 66447312266.

It is not an unprimeable number, because it can be changed into a prime (66447312263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1031225 + ... + 1093763.

It is an arithmetic number, because the mean of its divisors is an integer number (6430863120).

Almost surely, 2^66447312266 is an apocalyptic number.

66447312266 is a deficient number, since it is larger than the sum of its proper divisors (36446497654).

66447312266 is a wasteful number, since it uses less digits than its factorization.

66447312266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79709.

The product of its digits is 1741824, while the sum is 47.

The spelling of 66447312266 in words is "sixty-six billion, four hundred forty-seven million, three hundred twelve thousand, two hundred sixty-six".