8613661 has 12 divisors (see below), whose sum is σ = 10456992. Its totient is φ = 7061208.

The previous prime is 8613623. The next prime is 8613677. The reversal of 8613661 is 1663168.

It is not a de Polignac number, because 8613661 - 2⁹ = 8613149 is a prime.

8613661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8613161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2695 + ... + 4948.

It is an arithmetic number, because the mean of its divisors is an integer number (871416).

Almost surely, 2^8613661 is an apocalyptic number.

It is an amenable number.

8613661 is a deficient number, since it is larger than the sum of its proper divisors (1843331).

8613661 is a wasteful number, since it uses less digits than its factorization.

8613661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7680 (or 7673 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 8613661 is about 2934.9039166555. The cubic root of 8613661 is about 204.9883872065.

The spelling of 8613661 in words is "eight million, six hundred thirteen thousand, six hundred sixty-one".