6630553 has 2 divisors, whose sum is σ = 6630554. Its totient is φ = 6630552.

The previous prime is 6630551. The next prime is 6630583. The reversal of 6630553 is 3550366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3433609 + 3196944 = 1853^2 + 1788^2 .

It is a cyclic number.

It is not a de Polignac number, because 6630553 - 2¹ = 6630551 is a prime.

Together with 6630551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6630551) 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, 3315276 + 3315277.

It is an arithmetic number, because the mean of its divisors is an integer number (3315277).

Almost surely, 2^6630553 is an apocalyptic number.

It is an amenable number.

6630553 is a deficient number, since it is larger than the sum of its proper divisors (1).

6630553 is an equidigital number, since it uses as much as digits as its factorization.

6630553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 28.

The square root of 6630553 is about 2574.9860193795. The cubic root of 6630553 is about 187.8667476599.

The spelling of 6630553 in words is "six million, six hundred thirty thousand, five hundred fifty-three".