646600063 has 2 divisors, whose sum is σ = 646600064. Its totient is φ = 646600062.

The previous prime is 646600033. The next prime is 646600091. The reversal of 646600063 is 360006646.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646600063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646599998 and 646600034.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646600013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323300031 + 323300032.

It is an arithmetic number, because the mean of its divisors is an integer number (323300032).

Almost surely, 2^646600063 is an apocalyptic number.

646600063 is a deficient number, since it is larger than the sum of its proper divisors (1).

646600063 is an equidigital number, since it uses as much as digits as its factorization.

646600063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 646600063 is about 25428.3318957418. The cubic root of 646600063 is about 864.7261266680.

The spelling of 646600063 in words is "six hundred forty-six million, six hundred thousand, sixty-three".