2204020602661 has 2 divisors, whose sum is σ = 2204020602662. Its totient is φ = 2204020602660.

The previous prime is 2204020602649. The next prime is 2204020602671. The reversal of 2204020602661 is 1662060204022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1994961329761 + 209059272900 = 1412431^2 + 457230^2 .

It is a cyclic number.

It is not a de Polignac number, because 2204020602661 - 2⁷ = 2204020602533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2204020602671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1102010301330 + 1102010301331.

It is an arithmetic number, because the mean of its divisors is an integer number (1102010301331).

Almost surely, 2^{2204020602661} is an apocalyptic number.

It is an amenable number.

2204020602661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2204020602661 is an equidigital number, since it uses as much as digits as its factorization.

2204020602661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 2204020602661 its reverse (1662060204022), we get a palindrome (3866080806683).

The spelling of 2204020602661 in words is "two trillion, two hundred four billion, twenty million, six hundred two thousand, six hundred sixty-one".