66065556061553 has 8 divisors (see below), whose sum is σ = 67162724929440. Its totient is φ = 64977271152480.

The previous prime is 66065556061499. The next prime is 66065556061591. The reversal of 66065556061553 is 35516065556066.

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

It is a cyclic number.

It is not a de Polignac number, because 66065556061553 - 2¹⁰ = 66065556060529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66065556061492 and 66065556061501.

It is not an unprimeable number, because it can be changed into a prime (66065556066553) by changing a digit.

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, 2220974708 + ... + 2221004453.

It is an arithmetic number, because the mean of its divisors is an integer number (8395340616180).

Almost surely, 2^{66065556061553} is an apocalyptic number.

It is an amenable number.

66065556061553 is a deficient number, since it is larger than the sum of its proper divisors (1097168867887).

66065556061553 is a wasteful number, since it uses less digits than its factorization.

66065556061553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4441979407.

The product of its (nonzero) digits is 72900000, while the sum is 59.

The spelling of 66065556061553 in words is "sixty-six trillion, sixty-five billion, five hundred fifty-six million, sixty-one thousand, five hundred fifty-three".