8666633663 has 2 divisors, whose sum is σ = 8666633664. Its totient is φ = 8666633662.

The previous prime is 8666633653. The next prime is 8666633687. The reversal of 8666633663 is 3663366668.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8666633663 is a prime.

It is a super-2 number, since 2×8666633663² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8666633653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4333316831 + 4333316832.

It is an arithmetic number, because the mean of its divisors is an integer number (4333316832).

Almost surely, 2^8666633663 is an apocalyptic number.

8666633663 is a deficient number, since it is larger than the sum of its proper divisors (1).

8666633663 is an equidigital number, since it uses as much as digits as its factorization.

8666633663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10077696, while the sum is 53.

The square root of 8666633663 is about 93094.7563668330. The cubic root of 8666633663 is about 2054.0774418551.

The spelling of 8666633663 in words is "eight billion, six hundred sixty-six million, six hundred thirty-three thousand, six hundred sixty-three".