8661671 has 4 divisors (see below), whose sum is σ = 8695632. Its totient is φ = 8627712.

The previous prime is 8661643. The next prime is 8661673. The reversal of 8661671 is 1761668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8661671 - 2²² = 4467367 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 (8661673) 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, 16595 + ... + 17108.

It is an arithmetic number, because the mean of its divisors is an integer number (2173908).

Almost surely, 2^8661671 is an apocalyptic number.

8661671 is a deficient number, since it is larger than the sum of its proper divisors (33961).

8661671 is a wasteful number, since it uses less digits than its factorization.

8661671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33960.

The product of its digits is 12096, while the sum is 35.

The square root of 8661671 is about 2943.0716946755. The cubic root of 8661671 is about 205.3685300345.

The spelling of 8661671 in words is "eight million, six hundred sixty-one thousand, six hundred seventy-one".