8708661 has 32 divisors (see below), whose sum is σ = 14241920. Its totient is φ = 5225472.

The previous prime is 8708657. The next prime is 8708663. The reversal of 8708661 is 1668078.

It is not a de Polignac number, because 8708661 - 2² = 8708657 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 (8708663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14805 + ... + 15381.

It is an arithmetic number, because the mean of its divisors is an integer number (445060).

Almost surely, 2^8708661 is an apocalyptic number.

It is an amenable number.

8708661 is a deficient number, since it is larger than the sum of its proper divisors (5533259).

8708661 is a wasteful number, since it uses less digits than its factorization.

8708661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 8708661 is about 2951.0440525346. The cubic root of 8708661 is about 205.7392386646.

The spelling of 8708661 in words is "eight million, seven hundred eight thousand, six hundred sixty-one".