8666978371 has 2 divisors, whose sum is σ = 8666978372. Its totient is φ = 8666978370.

The previous prime is 8666978339. The next prime is 8666978389. The reversal of 8666978371 is 1738796668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8666978371 - 2⁵ = 8666978339 is a prime.

It is not a weakly prime, because it can be changed into another prime (8666978311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4333489185 + 4333489186.

It is an arithmetic number, because the mean of its divisors is an integer number (4333489186).

Almost surely, 2^8666978371 is an apocalyptic number.

8666978371 is a deficient number, since it is larger than the sum of its proper divisors (1).

8666978371 is an equidigital number, since it uses as much as digits as its factorization.

8666978371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18289152, while the sum is 61.

The square root of 8666978371 is about 93096.6077308943. The cubic root of 8666978371 is about 2054.1046745565.

The spelling of 8666978371 in words is "eight billion, six hundred sixty-six million, nine hundred seventy-eight thousand, three hundred seventy-one".