6621607 has 2 divisors, whose sum is σ = 6621608. Its totient is φ = 6621606.

The previous prime is 6621553. The next prime is 6621649. The reversal of 6621607 is 7061266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6621607 - 2¹⁹ = 6097319 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6621707) 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, 3310803 + 3310804.

It is an arithmetic number, because the mean of its divisors is an integer number (3310804).

Almost surely, 2^6621607 is an apocalyptic number.

6621607 is a deficient number, since it is larger than the sum of its proper divisors (1).

6621607 is an equidigital number, since it uses as much as digits as its factorization.

6621607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 6621607 is about 2573.2483362474. The cubic root of 6621607 is about 187.7822191476.

The spelling of 6621607 in words is "six million, six hundred twenty-one thousand, six hundred seven".