6619 has 2 divisors, whose sum is σ = 6620. Its totient is φ = 6618.

The previous prime is 6607. The next prime is 6637. The reversal of 6619 is 9166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6619 - 2⁷ = 6491 is a prime.

It is a super-2 number, since 2×6619² = 87622322, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 6619.

It is not a weakly prime, because it can be changed into another prime (6659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3309 + 3310.

It is an arithmetic number, because the mean of its divisors is an integer number (3310).

2⁶⁶¹⁹ is an apocalyptic number.

6619 is a deficient number, since it is larger than the sum of its proper divisors (1).

6619 is an equidigital number, since it uses as much as digits as its factorization.

6619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 22.

The square root of 6619 is about 81.3572369246. The cubic root of 6619 is about 18.7757571933.

It can be divided in two parts, 6 and 619, that added together give a 4-th power (625 = 5⁴).

The spelling of 6619 in words is "six thousand, six hundred nineteen".