717670666 has 8 divisors (see below), whose sum is σ = 1076710500. Its totient is φ = 358767168.

The previous prime is 717670661. The next prime is 717670711. The reversal of 717670666 is 666076717.

It can be written as a sum of positive squares in 2 ways, for example, as 435598641 + 282072025 = 20871^2 + 16795^2 .

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

It is not an unprimeable number, because it can be changed into a prime (717670661) 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 in 3 ways as a sum of consecutive naturals, for example, 19711 + ... + 42706.

Almost surely, 2^717670666 is an apocalyptic number.

717670666 is a deficient number, since it is larger than the sum of its proper divisors (359039834).

717670666 is a wasteful number, since it uses less digits than its factorization.

717670666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68168.

The product of its (nonzero) digits is 444528, while the sum is 46.

The square root of 717670666 is about 26789.3759912395. The cubic root of 717670666 is about 895.3133598898.

The spelling of 717670666 in words is "seven hundred seventeen million, six hundred seventy thousand, six hundred sixty-six".