3566261455661 has 2 divisors, whose sum is σ = 3566261455662. Its totient is φ = 3566261455660.

The previous prime is 3566261455657. The next prime is 3566261455667. The reversal of 3566261455661 is 1665541626653.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3499481076100 + 66780379561 = 1870690^2 + 258419^2 .

It is a cyclic number.

It is not a de Polignac number, because 3566261455661 - 2² = 3566261455657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3566261455597 and 3566261455606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3566261455667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1783130727830 + 1783130727831.

It is an arithmetic number, because the mean of its divisors is an integer number (1783130727831).

Almost surely, 2^{3566261455661} is an apocalyptic number.

It is an amenable number.

3566261455661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3566261455661 is an equidigital number, since it uses as much as digits as its factorization.

3566261455661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328000, while the sum is 56.

The spelling of 3566261455661 in words is "three trillion, five hundred sixty-six billion, two hundred sixty-one million, four hundred fifty-five thousand, six hundred sixty-one".