2661341273 has 2 divisors, whose sum is σ = 2661341274. Its totient is φ = 2661341272.

The previous prime is 2661341257. The next prime is 2661341297. The reversal of 2661341273 is 3721431662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1938376729 + 722964544 = 44027^2 + 26888^2 .

It is a cyclic number.

It is not a de Polignac number, because 2661341273 - 2⁴ = 2661341257 is a prime.

It is not a weakly prime, because it can be changed into another prime (2661341233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330670636 + 1330670637.

It is an arithmetic number, because the mean of its divisors is an integer number (1330670637).

Almost surely, 2^2661341273 is an apocalyptic number.

It is an amenable number.

2661341273 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661341273 is an equidigital number, since it uses as much as digits as its factorization.

2661341273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 2661341273 is about 51588.1892781671. The cubic root of 2661341273 is about 1385.7988280963.

The spelling of 2661341273 in words is "two billion, six hundred sixty-one million, three hundred forty-one thousand, two hundred seventy-three".