4636365661 has 2 divisors, whose sum is σ = 4636365662. Its totient is φ = 4636365660.

The previous prime is 4636365659. The next prime is 4636365689. The reversal of 4636365661 is 1665636364.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3574844100 + 1061521561 = 59790^2 + 32581^2 .

It is a cyclic number.

It is not a de Polignac number, because 4636365661 - 2¹ = 4636365659 is a prime.

Together with 4636365659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4636365761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2318182830 + 2318182831.

It is an arithmetic number, because the mean of its divisors is an integer number (2318182831).

Almost surely, 2^4636365661 is an apocalyptic number.

It is an amenable number.

4636365661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4636365661 is an equidigital number, since it uses as much as digits as its factorization.

4636365661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 46.

The square root of 4636365661 is about 68090.8632710733. The cubic root of 4636365661 is about 1667.4745987153.

The spelling of 4636365661 in words is "four billion, six hundred thirty-six million, three hundred sixty-five thousand, six hundred sixty-one".