6661717 has 4 divisors (see below), whose sum is σ = 6755616. Its totient is φ = 6567820.

The previous prime is 6661709. The next prime is 6661727. The reversal of 6661717 is 7171666.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 6661717 - 2³ = 6661709 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 (6661727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46843 + ... + 46984.

It is an arithmetic number, because the mean of its divisors is an integer number (1688904).

Almost surely, 2^6661717 is an apocalyptic number.

It is an amenable number.

6661717 is a deficient number, since it is larger than the sum of its proper divisors (93899).

6661717 is an equidigital number, since it uses as much as digits as its factorization.

6661717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93898.

The product of its digits is 10584, while the sum is 34.

The square root of 6661717 is about 2581.0302206677. The cubic root of 6661717 is about 188.1606160975.

The spelling of 6661717 in words is "six million, six hundred sixty-one thousand, seven hundred seventeen".