6699217 has 4 divisors (see below), whose sum is σ = 7656256. Its totient is φ = 5742180.

The previous prime is 6699211. The next prime is 6699221. The reversal of 6699217 is 7129966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7129966 = 2 ⋅3564983.

It is a cyclic number.

It is not a de Polignac number, because 6699217 - 2⁷ = 6699089 is a prime.

It is a Duffinian number.

6699217 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6699217.

It is not an unprimeable number, because it can be changed into a prime (6699211) 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 in 3 ways as a sum of consecutive naturals, for example, 478509 + ... + 478522.

It is an arithmetic number, because the mean of its divisors is an integer number (1914064).

Almost surely, 2^6699217 is an apocalyptic number.

It is an amenable number.

6699217 is a deficient number, since it is larger than the sum of its proper divisors (957039).

6699217 is an equidigital number, since it uses as much as digits as its factorization.

6699217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957038.

The product of its digits is 40824, while the sum is 40.

The square root of 6699217 is about 2588.2845670444. The cubic root of 6699217 is about 188.5130189630.

The spelling of 6699217 in words is "six million, six hundred ninety-nine thousand, two hundred seventeen".