6630457 has 2 divisors, whose sum is σ = 6630458. Its totient is φ = 6630456.

The previous prime is 6630433. The next prime is 6630461. The reversal of 6630457 is 7540366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4791721 + 1838736 = 2189^2 + 1356^2 .

It is a cyclic number.

It is not a de Polignac number, because 6630457 - 2¹¹ = 6628409 is a prime.

It is an Ulam number.

6630457 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6630467) 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, 3315228 + 3315229.

It is an arithmetic number, because the mean of its divisors is an integer number (3315229).

Almost surely, 2^6630457 is an apocalyptic number.

It is an amenable number.

6630457 is a deficient number, since it is larger than the sum of its proper divisors (1).

6630457 is an equidigital number, since it uses as much as digits as its factorization.

6630457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 6630457 is about 2574.9673784341. The cubic root of 6630457 is about 187.8658409837.

Subtracting 6630457 from its reverse (7540366), we obtain a palindrome (909909).

The spelling of 6630457 in words is "six million, six hundred thirty thousand, four hundred fifty-seven".