66055220450 has 54 divisors (see below), whose sum is σ = 129737327139. Its totient is φ = 25018367040.

The previous prime is 66055220447. The next prime is 66055220489. The reversal of 66055220450 is 5402255066.

66055220450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 50325294889 + 15729925561 = 224333^2 + 125419^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=181735.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66055220450.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 34528694 + ... + 34530606.

Almost surely, 2^66055220450 is an apocalyptic number.

66055220450 is a deficient number, since it is larger than the sum of its proper divisors (63682106689).

66055220450 is an equidigital number, since it uses as much as digits as its factorization.

66055220450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3876 (or 1939 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 66055220450 in words is "sixty-six billion, fifty-five million, two hundred twenty thousand, four hundred fifty".