6425663 has 2 divisors, whose sum is σ = 6425664. Its totient is φ = 6425662.

The previous prime is 6425651. The next prime is 6425687. The reversal of 6425663 is 3665246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6425663 - 2⁴ = 6425647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6425693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3212831 + 3212832.

It is an arithmetic number, because the mean of its divisors is an integer number (3212832).

Almost surely, 2^6425663 is an apocalyptic number.

6425663 is a deficient number, since it is larger than the sum of its proper divisors (1).

6425663 is an equidigital number, since it uses as much as digits as its factorization.

6425663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 32.

The square root of 6425663 is about 2534.8891494501. The cubic root of 6425663 is about 185.9113829994.

The spelling of 6425663 in words is "six million, four hundred twenty-five thousand, six hundred sixty-three".