666670670717 has 8 divisors (see below), whose sum is σ = 688215790080. Its totient is φ = 645128027280.

The previous prime is 666670670713. The next prime is 666670670749. The reversal of 666670670717 is 717076076666.

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

It is a cyclic number.

It is not a de Polignac number, because 666670670717 - 2² = 666670670713 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 (666670670713) 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, 63842 + ... + 1156467.

It is an arithmetic number, because the mean of its divisors is an integer number (86026973760).

Almost surely, 2^666670670717 is an apocalyptic number.

It is an amenable number.

666670670717 is a deficient number, since it is larger than the sum of its proper divisors (21545119363).

666670670717 is a wasteful number, since it uses less digits than its factorization.

666670670717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237963.

The product of its (nonzero) digits is 18670176, while the sum is 59.

The spelling of 666670670717 in words is "six hundred sixty-six billion, six hundred seventy million, six hundred seventy thousand, seven hundred seventeen".