66746400584 has 16 divisors (see below), whose sum is σ = 125220919020. Its totient is φ = 33354155520.

The previous prime is 66746400577. The next prime is 66746400599. The reversal of 66746400584 is 48500464766.

It can be written as a sum of positive squares in 2 ways, for example, as 55376443684 + 11369956900 = 235322^2 + 106630^2 .

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 3 ways as a sum of consecutive naturals, for example, 2365697 + ... + 2393744.

Almost surely, 2^66746400584 is an apocalyptic number.

It is an amenable number.

66746400584 is a deficient number, since it is larger than the sum of its proper divisors (58474518436).

66746400584 is a wasteful number, since it uses less digits than its factorization.

66746400584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4761200 (or 4761196 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 50.

The spelling of 66746400584 in words is "sixty-six billion, seven hundred forty-six million, four hundred thousand, five hundred eighty-four".