6699617 has 2 divisors, whose sum is σ = 6699618. Its totient is φ = 6699616.

The previous prime is 6699613. The next prime is 6699619. The reversal of 6699617 is 7169966.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6599761 + 99856 = 2569^2 + 316^2 .

It is a cyclic number.

It is not a de Polignac number, because 6699617 - 2² = 6699613 is a prime.

Together with 6699619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6699611) 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, 3349808 + 3349809.

It is an arithmetic number, because the mean of its divisors is an integer number (3349809).

Almost surely, 2^6699617 is an apocalyptic number.

It is an amenable number.

6699617 is a deficient number, since it is larger than the sum of its proper divisors (1).

6699617 is an equidigital number, since it uses as much as digits as its factorization.

6699617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 44.

The square root of 6699617 is about 2588.3618371472. The cubic root of 6699617 is about 188.5167708297.

The spelling of 6699617 in words is "six million, six hundred ninety-nine thousand, six hundred seventeen".