66223071517 has 8 divisors (see below), whose sum is σ = 69140119680. Its totient is φ = 63309172080.

The previous prime is 66223071479. The next prime is 66223071529. The reversal of 66223071517 is 71517032266.

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 66223071517 - 2¹⁹ = 66222547229 is a prime.

It is a super-2 number, since 2×66223071517² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66223071517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66223071917) 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, 744142 + ... + 828367.

It is an arithmetic number, because the mean of its divisors is an integer number (8642514960).

Almost surely, 2^66223071517 is an apocalyptic number.

It is an amenable number.

66223071517 is a deficient number, since it is larger than the sum of its proper divisors (2917048163).

66223071517 is a wasteful number, since it uses less digits than its factorization.

66223071517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574363.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 66223071517 in words is "sixty-six billion, two hundred twenty-three million, seventy-one thousand, five hundred seventeen".