986666663 has 2 divisors, whose sum is σ = 986666664. Its totient is φ = 986666662.

The previous prime is 986666641. The next prime is 986666699. The reversal of 986666663 is 366666689.

It is a weak prime.

It is an emirp because it is prime and its reverse (366666689) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 986666663 - 2⁸ = 986666407 is a prime.

It is a super-2 number, since 2×986666663² = 1947022207751111138, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 986666599 and 986666608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (986666363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493333331 + 493333332.

It is an arithmetic number, because the mean of its divisors is an integer number (493333332).

Almost surely, 2^986666663 is an apocalyptic number.

986666663 is a deficient number, since it is larger than the sum of its proper divisors (1).

986666663 is an equidigital number, since it uses as much as digits as its factorization.

986666663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10077696, while the sum is 56.

The square root of 986666663 is about 31411.2505800072. The cubic root of 986666663 is about 995.5356536033.

The spelling of 986666663 in words is "nine hundred eighty-six million, six hundred sixty-six thousand, six hundred sixty-three".