8666666677 has 2 divisors, whose sum is σ = 8666666678. Its totient is φ = 8666666676.

The previous prime is 8666666629. The next prime is 8666666699. The reversal of 8666666677 is 7766666668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7094861361 + 1571805316 = 84231^2 + 39646^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8666666677 is a prime.

It is a super-2 number, since 2×8666666677² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8666666377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4333333338 + 4333333339.

It is an arithmetic number, because the mean of its divisors is an integer number (4333333339).

Almost surely, 2^8666666677 is an apocalyptic number.

It is an amenable number.

8666666677 is a deficient number, since it is larger than the sum of its proper divisors (1).

8666666677 is an equidigital number, since it uses as much as digits as its factorization.

8666666677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109734912, while the sum is 64.

The square root of 8666666677 is about 93094.9336806252. The cubic root of 8666666677 is about 2054.0800500660.

Subtracting from 8666666677 its reverse (7766666668), we obtain a palindrome (900000009).

The spelling of 8666666677 in words is "eight billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred seventy-seven".