855566741 has 2 divisors, whose sum is σ = 855566742. Its totient is φ = 855566740.

The previous prime is 855566711. The next prime is 855566759. The reversal of 855566741 is 147665558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 562164100 + 293402641 = 23710^2 + 17129^2 .

It is a cyclic number.

It is not a de Polignac number, because 855566741 - 2¹⁴ = 855550357 is a prime.

It is a super-2 number, since 2×855566741² = 1463988896610722162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855566711) 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 as a sum of consecutive naturals, namely, 427783370 + 427783371.

It is an arithmetic number, because the mean of its divisors is an integer number (427783371).

Almost surely, 2^855566741 is an apocalyptic number.

It is an amenable number.

855566741 is a deficient number, since it is larger than the sum of its proper divisors (1).

855566741 is an equidigital number, since it uses as much as digits as its factorization.

855566741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008000, while the sum is 47.

The square root of 855566741 is about 29250.0724956367. The cubic root of 855566741 is about 949.3316595618.

The spelling of 855566741 in words is "eight hundred fifty-five million, five hundred sixty-six thousand, seven hundred forty-one".