66226889682 has 30 divisors (see below), whose sum is σ = 148404629703. Its totient is φ = 22074538068.

The previous prime is 66226889671. The next prime is 66226889683. The reversal of 66226889682 is 28698862266.

It can be written as a sum of positive squares in only one way, i.e., 33113444841 + 33113444841 = 181971^2 + 181971^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=181971.

It is a super-2 number, since 2×66226889682² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66226889683) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 3265369 + ... + 3285587.

Almost surely, 2^66226889682 is an apocalyptic number.

66226889682 is an abundant number, since it is smaller than the sum of its proper divisors (82177740021).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66226889682 is an frugal number, since it uses more digits than its factorization.

66226889682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40452 (or 20224 counting only the distinct ones).

The product of its digits is 47775744, while the sum is 63.

The spelling of 66226889682 in words is "sixty-six billion, two hundred twenty-six million, eight hundred eighty-nine thousand, six hundred eighty-two".