2205161600661 has 12 divisors (see below), whose sum is σ = 3204306679392. Its totient is φ = 1461304692456.

The previous prime is 2205161600627. The next prime is 2205161600669. The reversal of 2205161600661 is 1660061615022.

2205161600661 is a `hidden beast` number, since 2 + 20 + 516 + 1 + 60 + 0 + 6 + 61 = 666.

It is not a de Polignac number, because 2205161600661 - 2⁷ = 2205161600533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2205161600669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 733585191 + ... + 733588196.

It is an arithmetic number, because the mean of its divisors is an integer number (267025556616).

Almost surely, 2^{2205161600661} is an apocalyptic number.

It is an amenable number.

2205161600661 is a deficient number, since it is larger than the sum of its proper divisors (999145078731).

2205161600661 is a wasteful number, since it uses less digits than its factorization.

2205161600661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467173560 (or 1467173557 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 2205161600661 in words is "two trillion, two hundred five billion, one hundred sixty-one million, six hundred thousand, six hundred sixty-one".