8671666 has 8 divisors (see below), whose sum is σ = 13772700. Its totient is φ = 4080768.

The previous prime is 8671639. The next prime is 8671669. The reversal of 8671666 is 6661768.

It can be written as a sum of positive squares in 2 ways, for example, as 8242641 + 429025 = 2871^2 + 655^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8671669) 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, 127491 + ... + 127558.

Almost surely, 2^8671666 is an apocalyptic number.

8671666 is a deficient number, since it is larger than the sum of its proper divisors (5101034).

8671666 is a wasteful number, since it uses less digits than its factorization.

8671666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255068.

The product of its digits is 72576, while the sum is 40.

The square root of 8671666 is about 2944.7692609099. The cubic root of 8671666 is about 205.4474936055.

The spelling of 8671666 in words is "eight million, six hundred seventy-one thousand, six hundred sixty-six".