66301540616 has 8 divisors (see below), whose sum is σ = 124315388670. Its totient is φ = 33150770304.

The previous prime is 66301540601. The next prime is 66301540637. The reversal of 66301540616 is 61604510366.

It can be written as a sum of positive squares in only one way, i.e., 64541402500 + 1760138116 = 254050^2 + 41954^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 66301540616.

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 as a sum of consecutive naturals, namely, 4143846281 + ... + 4143846296.

Almost surely, 2^66301540616 is an apocalyptic number.

It is an amenable number.

66301540616 is a deficient number, since it is larger than the sum of its proper divisors (58013848054).

66301540616 is a wasteful number, since it uses less digits than its factorization.

66301540616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8287692583 (or 8287692579 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 66301540616 in words is "sixty-six billion, three hundred one million, five hundred forty thousand, six hundred sixteen".