66056804450 has 72 divisors (see below), whose sum is σ = 153919687572. Its totient is φ = 20905879680.

The previous prime is 66056804449. The next prime is 66056804521. The reversal of 66056804450 is 5440865066.

It can be written as a sum of positive squares in 6 ways, for example, as 25968355609 + 40088448841 = 161147^2 + 200221^2 .

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 1005149 + ... + 1068848.

Almost surely, 2^66056804450 is an apocalyptic number.

66056804450 is an abundant number, since it is smaller than the sum of its proper divisors (87862883122).

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

66056804450 is a wasteful number, since it uses less digits than its factorization.

66056804450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074036 (or 2074024 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 66056804450 in words is "sixty-six billion, fifty-six million, eight hundred four thousand, four hundred fifty".