3663555564761 has 2 divisors, whose sum is σ = 3663555564762. Its totient is φ = 3663555564760.

The previous prime is 3663555564701. The next prime is 3663555564763. The reversal of 3663555564761 is 1674655553663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3569907936400 + 93647628361 = 1889420^2 + 306019^2 .

It is a cyclic number.

It is not a de Polignac number, because 3663555564761 - 2³⁴ = 3646375695577 is a prime.

Together with 3663555564763, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3663555564694 and 3663555564703.

It is not a weakly prime, because it can be changed into another prime (3663555564763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1831777782380 + 1831777782381.

It is an arithmetic number, because the mean of its divisors is an integer number (1831777782381).

Almost surely, 2^{3663555564761} is an apocalyptic number.

It is an amenable number.

3663555564761 is a deficient number, since it is larger than the sum of its proper divisors (1).

3663555564761 is an equidigital number, since it uses as much as digits as its factorization.

3663555564761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120000, while the sum is 62.

The spelling of 3663555564761 in words is "three trillion, six hundred sixty-three billion, five hundred fifty-five million, five hundred sixty-four thousand, seven hundred sixty-one".