66615675151717 has 8 divisors (see below), whose sum is σ = 67529536050816. Its totient is φ = 65701849858272.

The previous prime is 66615675151609. The next prime is 66615675151721. The reversal of 66615675151717 is 71715157651666.

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 66615675151717 - 2¹¹ = 66615675149669 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 (66615675151747) 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, 5122963 + ... + 12628384.

It is an arithmetic number, because the mean of its divisors is an integer number (8441192006352).

Almost surely, 2^{66615675151717} is an apocalyptic number.

It is an amenable number.

66615675151717 is a deficient number, since it is larger than the sum of its proper divisors (913860899099).

66615675151717 is a wasteful number, since it uses less digits than its factorization.

66615675151717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17802827.

The product of its digits is 55566000, while the sum is 64.

The spelling of 66615675151717 in words is "sixty-six trillion, six hundred fifteen billion, six hundred seventy-five million, one hundred fifty-one thousand, seven hundred seventeen".