66524703217 has 8 divisors (see below), whose sum is σ = 77882579712. Its totient is φ = 55630413600.

The previous prime is 66524703197. The next prime is 66524703281. The reversal of 66524703217 is 71230742566.

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 66524703217 - 2¹¹ = 66524701169 is a prime.

It is a super-2 number, since 2×66524703217² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66524703017) 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 7 ways as a sum of consecutive naturals, for example, 115896409 + ... + 115896982.

It is an arithmetic number, because the mean of its divisors is an integer number (9735322464).

Almost surely, 2^66524703217 is an apocalyptic number.

It is an amenable number.

66524703217 is a deficient number, since it is larger than the sum of its proper divisors (11357876495).

66524703217 is a wasteful number, since it uses less digits than its factorization.

66524703217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231793439.

The product of its (nonzero) digits is 423360, while the sum is 43.

The spelling of 66524703217 in words is "sixty-six billion, five hundred twenty-four million, seven hundred three thousand, two hundred seventeen".