66533055757663 has 16 divisors (see below), whose sum is σ = 75739321711872. Its totient is φ = 57853235880000.

The previous prime is 66533055757633. The next prime is 66533055757667. The reversal of 66533055757663 is 36675755033566.

It is not a de Polignac number, because 66533055757663 - 2¹³ = 66533055749471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66533055757667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5614843 + ... + 12829363.

It is an arithmetic number, because the mean of its divisors is an integer number (4733707606992).

Almost surely, 2^{66533055757663} is an apocalyptic number.

66533055757663 is a deficient number, since it is larger than the sum of its proper divisors (9206265954209).

66533055757663 is a wasteful number, since it uses less digits than its factorization.

66533055757663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7251006.

The product of its (nonzero) digits is 1071630000, while the sum is 67.

The spelling of 66533055757663 in words is "sixty-six trillion, five hundred thirty-three billion, fifty-five million, seven hundred fifty-seven thousand, six hundred sixty-three".