8171668 has 12 divisors (see below), whose sum is σ = 14448532. Its totient is φ = 4043520.

The previous prime is 8171659. The next prime is 8171687. The reversal of 8171668 is 8661718.

It can be written as a sum of positive squares in 2 ways, for example, as 6563844 + 1607824 = 2562^2 + 1268^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10143 + ... + 10918.

Almost surely, 2^8171668 is an apocalyptic number.

It is an amenable number.

8171668 is a deficient number, since it is larger than the sum of its proper divisors (6276864).

8171668 is a wasteful number, since it uses less digits than its factorization.

8171668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21162 (or 21160 counting only the distinct ones).

The product of its digits is 16128, while the sum is 37.

The square root of 8171668 is about 2858.6129503660. The cubic root of 8171668 is about 201.4204543305.

It can be divided in two parts, 817 and 1668, that added together give a triangular number (2485 = T₇₀).

The spelling of 8171668 in words is "eight million, one hundred seventy-one thousand, six hundred sixty-eight".