8006661 has 16 divisors (see below), whose sum is σ = 12774720. Its totient is φ = 4926960.

The previous prime is 8006651. The next prime is 8006683. The reversal of 8006661 is 1666008.

It is not a de Polignac number, because 8006661 - 2⁵ = 8006629 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8006611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11055 + ... + 11756.

It is an arithmetic number, because the mean of its divisors is an integer number (798420).

Almost surely, 2^8006661 is an apocalyptic number.

It is an amenable number.

8006661 is a deficient number, since it is larger than the sum of its proper divisors (4768059).

8006661 is a wasteful number, since it uses less digits than its factorization.

8006661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22833 (or 22827 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 8006661 is about 2829.6043893096. The cubic root of 8006661 is about 200.0554929346.

The spelling of 8006661 in words is "eight million, six thousand, six hundred sixty-one".