8506661 has 8 divisors (see below), whose sum is σ = 9021600. Its totient is φ = 7998480.

The previous prime is 8506651. The next prime is 8506703. The reversal of 8506661 is 1666058.

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 8506661 - 2¹⁸ = 8244517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8506651) 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, 1031 + ... + 4251.

It is an arithmetic number, because the mean of its divisors is an integer number (1127700).

Almost surely, 2^8506661 is an apocalyptic number.

It is an amenable number.

8506661 is a deficient number, since it is larger than the sum of its proper divisors (514939).

8506661 is a wasteful number, since it uses less digits than its factorization.

8506661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 8506661 is about 2916.6180757857. The cubic root of 8506661 is about 204.1360507935.

The spelling of 8506661 in words is "eight million, five hundred six thousand, six hundred sixty-one".