3664159661 has 2 divisors, whose sum is σ = 3664159662. Its totient is φ = 3664159660.

The previous prime is 3664159649. The next prime is 3664159663. The reversal of 3664159661 is 1669514663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3058753636 + 605406025 = 55306^2 + 24605^2 .

It is a cyclic number.

It is not a de Polignac number, because 3664159661 - 2¹⁰ = 3664158637 is a prime.

Together with 3664159663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3664159663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1832079830 + 1832079831.

It is an arithmetic number, because the mean of its divisors is an integer number (1832079831).

Almost surely, 2^3664159661 is an apocalyptic number.

It is an amenable number.

3664159661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3664159661 is an equidigital number, since it uses as much as digits as its factorization.

3664159661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 47.

The square root of 3664159661 is about 60532.3026243013. The cubic root of 3664159661 is about 1541.6701480490.

The spelling of 3664159661 in words is "three billion, six hundred sixty-four million, one hundred fifty-nine thousand, six hundred sixty-one".