666101717 has 4 divisors (see below), whose sum is σ = 666190176. Its totient is φ = 666013260.

The previous prime is 666101699. The next prime is 666101741. The reversal of 666101717 is 717101666.

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 666101717 - 2¹⁰ = 666100693 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 (666101797) 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, 31763 + ... + 48384.

It is an arithmetic number, because the mean of its divisors is an integer number (166547544).

Almost surely, 2^666101717 is an apocalyptic number.

It is an amenable number.

666101717 is a deficient number, since it is larger than the sum of its proper divisors (88459).

666101717 is an equidigital number, since it uses as much as digits as its factorization.

666101717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88458.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 666101717 is about 25808.9464527322. The cubic root of 666101717 is about 873.3336305025. Note that the first 3 decimals are identical.

The spelling of 666101717 in words is "six hundred sixty-six million, one hundred one thousand, seven hundred seventeen".