626663 has 2 divisors, whose sum is σ = 626664. Its totient is φ = 626662.

The previous prime is 626629. The next prime is 626683. The reversal of 626663 is 366626.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 626663 - 2⁶ = 626599 is a prime.

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 (626623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313331 + 313332.

It is an arithmetic number, because the mean of its divisors is an integer number (313332).

2⁶²⁶⁶⁶³ is an apocalyptic number.

626663 is a deficient number, since it is larger than the sum of its proper divisors (1).

626663 is an equidigital number, since it uses as much as digits as its factorization.

626663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 29.

The square root of 626663 is about 791.6204898814. The cubic root of 626663 is about 85.5745619087.

The spelling of 626663 in words is "six hundred twenty-six thousand, six hundred sixty-three".