555421663 has 2 divisors, whose sum is σ = 555421664. Its totient is φ = 555421662.

The previous prime is 555421649. The next prime is 555421681. The reversal of 555421663 is 366124555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 555421663 - 2⁵ = 555421631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555421613) 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, 277710831 + 277710832.

It is an arithmetic number, because the mean of its divisors is an integer number (277710832).

Almost surely, 2^555421663 is an apocalyptic number.

555421663 is a deficient number, since it is larger than the sum of its proper divisors (1).

555421663 is an equidigital number, since it uses as much as digits as its factorization.

555421663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108000, while the sum is 37.

The square root of 555421663 is about 23567.3855783793. The cubic root of 555421663 is about 822.0046446499.

The spelling of 555421663 in words is "five hundred fifty-five million, four hundred twenty-one thousand, six hundred sixty-three".