8305661 has 16 divisors (see below), whose sum is σ = 10329984. Its totient is φ = 6502464.

The previous prime is 8305597. The next prime is 8305669. The reversal of 8305661 is 1665038.

It is a cyclic number.

It is not a de Polignac number, because 8305661 - 2⁶ = 8305597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8305669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9311 + ... + 10163.

It is an arithmetic number, because the mean of its divisors is an integer number (645624).

Almost surely, 2^8305661 is an apocalyptic number.

It is an amenable number.

8305661 is a deficient number, since it is larger than the sum of its proper divisors (2024323).

8305661 is a wasteful number, since it uses less digits than its factorization.

8305661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 8305661 is about 2881.9543716027. The cubic root of 8305661 is about 202.5154060321.

The spelling of 8305661 in words is "eight million, three hundred five thousand, six hundred sixty-one".