8307661 has 2 divisors, whose sum is σ = 8307662. Its totient is φ = 8307660.

The previous prime is 8307641. The next prime is 8307667. The reversal of 8307661 is 1667038.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5808100 + 2499561 = 2410^2 + 1581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8307661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8307667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4153830 + 4153831.

It is an arithmetic number, because the mean of its divisors is an integer number (4153831).

Almost surely, 2^8307661 is an apocalyptic number.

It is an amenable number.

8307661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8307661 is an equidigital number, since it uses as much as digits as its factorization.

8307661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 8307661 is about 2882.3013374732. The cubic root of 8307661 is about 202.5316599383.

The spelling of 8307661 in words is "eight million, three hundred seven thousand, six hundred sixty-one".