8666698366945 has 16 divisors (see below), whose sum is σ = 10421069440320. Its totient is φ = 6919348371264.

The previous prime is 8666698366943. The next prime is 8666698366951. The reversal of 8666698366945 is 5496638966668.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 8666698366945 - 2¹ = 8666698366943 is a prime.

It is a super-2 number, since 2×8666698366945² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8666698366943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5885299 + ... + 7209031.

It is an arithmetic number, because the mean of its divisors is an integer number (651316840020).

Almost surely, 2^{8666698366945} is an apocalyptic number.

It is an amenable number.

8666698366945 is a deficient number, since it is larger than the sum of its proper divisors (1754371073375).

8666698366945 is a wasteful number, since it uses less digits than its factorization.

8666698366945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326384.

The product of its digits is 14511882240, while the sum is 82.

The spelling of 8666698366945 in words is "eight trillion, six hundred sixty-six billion, six hundred ninety-eight million, three hundred sixty-six thousand, nine hundred forty-five".