8661653 has 32 divisors (see below), whose sum is σ = 12337920. Its totient is φ = 5852160.

The previous prime is 8661643. The next prime is 8661673. The reversal of 8661653 is 3561668.

It is a cyclic number.

It is not a de Polignac number, because 8661653 - 2¹² = 8657557 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8661623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16763 + ... + 17271.

It is an arithmetic number, because the mean of its divisors is an integer number (385560).

Almost surely, 2^8661653 is an apocalyptic number.

It is an amenable number.

8661653 is a deficient number, since it is larger than the sum of its proper divisors (3676267).

8661653 is a wasteful number, since it uses less digits than its factorization.

8661653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557.

The product of its digits is 25920, while the sum is 35.

The square root of 8661653 is about 2943.0686366444. The cubic root of 8661653 is about 205.3683877742.

The spelling of 8661653 in words is "eight million, six hundred sixty-one thousand, six hundred fifty-three".