66024653065561 has 8 divisors (see below), whose sum is σ = 70757325025344. Its totient is φ = 61447150678320.

The previous prime is 66024653065549. The next prime is 66024653065577. The reversal of 66024653065561 is 16556035642066.

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 66024653065561 - 2¹⁷ = 66024652934489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66024653065541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38792392255 + ... + 38792393956.

It is an arithmetic number, because the mean of its divisors is an integer number (8844665628168).

Almost surely, 2^{66024653065561} is an apocalyptic number.

It is an amenable number.

66024653065561 is a deficient number, since it is larger than the sum of its proper divisors (4732671959783).

66024653065561 is a wasteful number, since it uses less digits than its factorization.

66024653065561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77584786271.

The product of its (nonzero) digits is 23328000, while the sum is 55.

The spelling of 66024653065561 in words is "sixty-six trillion, twenty-four billion, six hundred fifty-three million, sixty-five thousand, five hundred sixty-one".