6662717 has 2 divisors, whose sum is σ = 6662718. Its totient is φ = 6662716.

The previous prime is 6662707. The next prime is 6662723. The reversal of 6662717 is 7172666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6661561 + 1156 = 2581^2 + 34^2 .

It is a cyclic number.

It is not a de Polignac number, because 6662717 - 2¹⁰ = 6661693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6662707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3331358 + 3331359.

It is an arithmetic number, because the mean of its divisors is an integer number (3331359).

Almost surely, 2^6662717 is an apocalyptic number.

It is an amenable number.

6662717 is a deficient number, since it is larger than the sum of its proper divisors (1).

6662717 is an equidigital number, since it uses as much as digits as its factorization.

6662717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 35.

The square root of 6662717 is about 2581.2239344931. The cubic root of 6662717 is about 188.1700306474.

The spelling of 6662717 in words is "six million, six hundred sixty-two thousand, seven hundred seventeen".