8632661 has 2 divisors, whose sum is σ = 8632662. Its totient is φ = 8632660.

The previous prime is 8632649. The next prime is 8632667. The reversal of 8632661 is 1662368.

8632661 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8151025 + 481636 = 2855^2 + 694^2 .

It is a cyclic number.

It is not a de Polignac number, because 8632661 - 2⁶ = 8632597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8632667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4316330 + 4316331.

It is an arithmetic number, because the mean of its divisors is an integer number (4316331).

Almost surely, 2^8632661 is an apocalyptic number.

It is an amenable number.

8632661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8632661 is an equidigital number, since it uses as much as digits as its factorization.

8632661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 8632661 is about 2938.1390368735. The cubic root of 8632661 is about 205.1389975437.

The spelling of 8632661 in words is "eight million, six hundred thirty-two thousand, six hundred sixty-one".