666884983 has 2 divisors, whose sum is σ = 666884984. Its totient is φ = 666884982.

The previous prime is 666884963. The next prime is 666885013. The reversal of 666884983 is 389488666.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666884983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666884903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333442491 + 333442492.

It is an arithmetic number, because the mean of its divisors is an integer number (333442492).

Almost surely, 2^666884983 is an apocalyptic number.

666884983 is a deficient number, since it is larger than the sum of its proper divisors (1).

666884983 is an equidigital number, since it uses as much as digits as its factorization.

666884983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11943936, while the sum is 58.

The square root of 666884983 is about 25824.1163062746. The cubic root of 666884983 is about 873.6758127710.

The spelling of 666884983 in words is "six hundred sixty-six million, eight hundred eighty-four thousand, nine hundred eighty-three".