2066321655061 has 12 divisors (see below), whose sum is σ = 2181206637324. Its totient is φ = 1957202251200.

The previous prime is 2066321655049. The next prime is 2066321655071. The reversal of 2066321655061 is 1605561236602.

It can be written as a sum of positive squares in 2 ways, for example, as 915142870161 + 1151178784900 = 956631^2 + 1072930^2 .

It is not a de Polignac number, because 2066321655061 - 2⁷ = 2066321654933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2066321654999 and 2066321655017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066321655071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1410681 + ... + 2474401.

It is an arithmetic number, because the mean of its divisors is an integer number (181767219777).

Almost surely, 2^{2066321655061} is an apocalyptic number.

It is an amenable number.

2066321655061 is a deficient number, since it is larger than the sum of its proper divisors (114884982263).

2066321655061 is a wasteful number, since it uses less digits than its factorization.

2066321655061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069140 (or 1069121 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 2066321655061 in words is "two trillion, sixty-six billion, three hundred twenty-one million, six hundred fifty-five thousand, sixty-one".