8259661 has 4 divisors (see below), whose sum is σ = 8694400. Its totient is φ = 7824924.

The previous prime is 8259659. The next prime is 8259683. The reversal of 8259661 is 1669528.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8259661 - 2¹ = 8259659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8259661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8259631) 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, 217341 + ... + 217378.

It is an arithmetic number, because the mean of its divisors is an integer number (2173600).

Almost surely, 2^8259661 is an apocalyptic number.

It is an amenable number.

8259661 is a deficient number, since it is larger than the sum of its proper divisors (434739).

8259661 is a wasteful number, since it uses less digits than its factorization.

8259661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434738.

The product of its digits is 25920, while the sum is 37.

The square root of 8259661 is about 2873.9625954420. The cubic root of 8259661 is about 202.1408438388.

The spelling of 8259661 in words is "eight million, two hundred fifty-nine thousand, six hundred sixty-one".