6630551 has 2 divisors, whose sum is σ = 6630552. Its totient is φ = 6630550.

The previous prime is 6630541. The next prime is 6630553. The reversal of 6630551 is 1550366.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6630551 is a prime.

It is a Sophie Germain prime.

Together with 6630553, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6630551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6630553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3315275 + 3315276.

It is an arithmetic number, because the mean of its divisors is an integer number (3315276).

Almost surely, 2^6630551 is an apocalyptic number.

6630551 is a deficient number, since it is larger than the sum of its proper divisors (1).

6630551 is an equidigital number, since it uses as much as digits as its factorization.

6630551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 6630551 is about 2574.9856310279. The cubic root of 6630551 is about 187.8667287709.

The spelling of 6630551 in words is "six million, six hundred thirty thousand, five hundred fifty-one".