66395761201 has 32 divisors (see below), whose sum is σ = 83080083456. Its totient is φ = 51549264000.

The previous prime is 66395761181. The next prime is 66395761217. The reversal of 66395761201 is 10216759366.

It is a cyclic number.

It is not a de Polignac number, because 66395761201 - 2¹⁷ = 66395630129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66395761291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33015286 + ... + 33017296.

It is an arithmetic number, because the mean of its divisors is an integer number (2596252608).

Almost surely, 2^66395761201 is an apocalyptic number.

It is an amenable number.

66395761201 is a deficient number, since it is larger than the sum of its proper divisors (16684322255).

66395761201 is a wasteful number, since it uses less digits than its factorization.

66395761201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3373.

The product of its (nonzero) digits is 408240, while the sum is 46.

The spelling of 66395761201 in words is "sixty-six billion, three hundred ninety-five million, seven hundred sixty-one thousand, two hundred one".