8533661 has 4 divisors (see below), whose sum is σ = 8545692. Its totient is φ = 8521632.

The previous prime is 8533639. The next prime is 8533663. The reversal of 8533661 is 1663358.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1663358 = 2 ⋅831679.

It can be written as a sum of positive squares in 2 ways, for example, as 3667225 + 4866436 = 1915^2 + 2206^2 .

It is a cyclic number.

It is not a de Polignac number, because 8533661 - 2¹⁰ = 8532637 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 (8533663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4880 + ... + 6393.

It is an arithmetic number, because the mean of its divisors is an integer number (2136423).

Almost surely, 2^8533661 is an apocalyptic number.

It is an amenable number.

8533661 is a deficient number, since it is larger than the sum of its proper divisors (12031).

8533661 is a wasteful number, since it uses less digits than its factorization.

8533661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12030.

The product of its digits is 12960, while the sum is 32.

The square root of 8533661 is about 2921.2430573302. The cubic root of 8533661 is about 204.3517975012.

The spelling of 8533661 in words is "eight million, five hundred thirty-three thousand, six hundred sixty-one".