8543661 has 16 divisors (see below), whose sum is σ = 13468800. Its totient is φ = 4713408.

The previous prime is 8543657. The next prime is 8543681. The reversal of 8543661 is 1663458.

8543661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8543661 - 2² = 8543657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8543641) 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, 6406 + ... + 7623.

It is an arithmetic number, because the mean of its divisors is an integer number (841800).

Almost surely, 2^8543661 is an apocalyptic number.

It is an amenable number.

8543661 is a deficient number, since it is larger than the sum of its proper divisors (4925139).

8543661 is a wasteful number, since it uses less digits than its factorization.

8543661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14068.

The product of its digits is 17280, while the sum is 33.

The square root of 8543661 is about 2922.9541563288. The cubic root of 8543661 is about 204.4315881982.

The spelling of 8543661 in words is "eight million, five hundred forty-three thousand, six hundred sixty-one".