66044040416345 has 8 divisors (see below), whose sum is σ = 79254395475720. Its totient is φ = 52834201015680.

The previous prime is 66044040416297. The next prime is 66044040416443. The reversal of 66044040416345 is 54361404044066.

It can be written as a sum of positive squares in 4 ways, for example, as 2365108727881 + 63678931688464 = 1537891^2 + 7979908^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66044040416345 - 2⁴⁰ = 64944528788569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66044040416345.

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 7 ways as a sum of consecutive naturals, for example, 128632850 + ... + 129145259.

It is an arithmetic number, because the mean of its divisors is an integer number (9906799434465).

Almost surely, 2^{66044040416345} is an apocalyptic number.

It is an amenable number.

66044040416345 is a deficient number, since it is larger than the sum of its proper divisors (13210355059375).

66044040416345 is a wasteful number, since it uses less digits than its factorization.

66044040416345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257829355.

The product of its (nonzero) digits is 3317760, while the sum is 47.

The spelling of 66044040416345 in words is "sixty-six trillion, forty-four billion, forty million, four hundred sixteen thousand, three hundred forty-five".