66453128308 has 54 divisors (see below), whose sum is σ = 136105685394. Its totient is φ = 28307045088.

The previous prime is 66453128303. The next prime is 66453128341. The reversal of 66453128308 is 80382135466.

It can be written as a sum of positive squares in only one way, i.e., 40428340624 + 26024787684 = 201068^2 + 161322^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66453128303) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 5460166 + ... + 5472322.

Almost surely, 2^66453128308 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66453128308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68052842697).

66453128308 is an abundant number, since it is smaller than the sum of its proper divisors (69652557086).

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

66453128308 is a wasteful number, since it uses less digits than its factorization.

66453128308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12509 (or 12333 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 66453128308 in words is "sixty-six billion, four hundred fifty-three million, one hundred twenty-eight thousand, three hundred eight".