6659917 has 8 divisors (see below), whose sum is σ = 7443072. Its totient is φ = 5906400.

The previous prime is 6659893. The next prime is 6659921. The reversal of 6659917 is 7199566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6659917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6659957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6933 + ... + 7834.

It is an arithmetic number, because the mean of its divisors is an integer number (930384).

Almost surely, 2^6659917 is an apocalyptic number.

It is an amenable number.

6659917 is a deficient number, since it is larger than the sum of its proper divisors (783155).

6659917 is a wasteful number, since it uses less digits than its factorization.

6659917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14819.

The product of its digits is 102060, while the sum is 43.

The square root of 6659917 is about 2580.6814991393. The cubic root of 6659917 is about 188.1436675331.

The spelling of 6659917 in words is "six million, six hundred fifty-nine thousand, nine hundred seventeen".