8601661 has 16 divisors (see below), whose sum is σ = 9547200. Its totient is φ = 7717248.

The previous prime is 8601653. The next prime is 8601667. The reversal of 8601661 is 1661068.

It is not a de Polignac number, because 8601661 - 2³ = 8601653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8601667) 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, 36801 + ... + 37033.

It is an arithmetic number, because the mean of its divisors is an integer number (596700).

Almost surely, 2^8601661 is an apocalyptic number.

It is an amenable number.

8601661 is a deficient number, since it is larger than the sum of its proper divisors (945539).

8601661 is a wasteful number, since it uses less digits than its factorization.

8601661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 8601661 is about 2932.8588441996. The cubic root of 8601661 is about 204.8931507429.

The spelling of 8601661 in words is "eight million, six hundred one thousand, six hundred sixty-one".