8265661 has 4 divisors (see below), whose sum is σ = 8350972. Its totient is φ = 8180352.

The previous prime is 8265659. The next prime is 8265679. The reversal of 8265661 is 1665628.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3728761 + 4536900 = 1931^2 + 2130^2 .

It is a cyclic number.

It is not a de Polignac number, because 8265661 - 2¹ = 8265659 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 (8265161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42510 + ... + 42703.

It is an arithmetic number, because the mean of its divisors is an integer number (2087743).

Almost surely, 2^8265661 is an apocalyptic number.

It is an amenable number.

8265661 is a deficient number, since it is larger than the sum of its proper divisors (85311).

8265661 is an equidigital number, since it uses as much as digits as its factorization.

8265661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85310.

The product of its digits is 17280, while the sum is 34.

The square root of 8265661 is about 2875.0062608627. The cubic root of 8265661 is about 202.1897785147.

It can be divided in two parts, 8265 and 661, that multiplied together give a triangular number (5463165 = T₃₃₀₅).

The spelling of 8265661 in words is "eight million, two hundred sixty-five thousand, six hundred sixty-one".