8718661 has 8 divisors (see below), whose sum is σ = 9987840. Its totient is φ = 7455408.

The previous prime is 8718649. The next prime is 8718673. The reversal of 8718661 is 1668178.

It is an interprime number because it is at equal distance from previous prime (8718649) and next prime (8718673).

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

It is a cyclic number.

It is not a de Polignac number, because 8718661 - 2¹¹ = 8716613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8718661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8718601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2340 + ... + 4786.

It is an arithmetic number, because the mean of its divisors is an integer number (1248480).

Almost surely, 2^8718661 is an apocalyptic number.

It is an amenable number.

8718661 is a deficient number, since it is larger than the sum of its proper divisors (1269179).

8718661 is a wasteful number, since it uses less digits than its factorization.

8718661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2963.

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

The square root of 8718661 is about 2952.7378820342. The cubic root of 8718661 is about 205.8179574404.

The spelling of 8718661 in words is "eight million, seven hundred eighteen thousand, six hundred sixty-one".