66228345458 has 54 divisors (see below), whose sum is σ = 111231663501. Its totient is φ = 29552415200.

The previous prime is 66228345437. The next prime is 66228345461. The reversal of 66228345458 is 85454382266.

It can be written as a sum of positive squares in 2 ways, for example, as 59757269209 + 6471076249 = 244453^2 + 80443^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=181973.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 284241710 + ... + 284241942.

Almost surely, 2^66228345458 is an apocalyptic number.

66228345458 is a deficient number, since it is larger than the sum of its proper divisors (45003318043).

66228345458 is an equidigital number, since it uses as much as digits as its factorization.

66228345458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632 (or 317 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 53.

The spelling of 66228345458 in words is "sixty-six billion, two hundred twenty-eight million, three hundred forty-five thousand, four hundred fifty-eight".