866250461 has 2 divisors, whose sum is σ = 866250462. Its totient is φ = 866250460.

The previous prime is 866250433. The next prime is 866250491. The reversal of 866250461 is 164052668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 628504900 + 237745561 = 25070^2 + 15419^2 .

It is a cyclic number.

It is not a de Polignac number, because 866250461 - 2⁶ = 866250397 is a prime.

It is a super-2 number, since 2×866250461² = 1500779722365425042, 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 (866250491) 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, 433125230 + 433125231.

It is an arithmetic number, because the mean of its divisors is an integer number (433125231).

Almost surely, 2^866250461 is an apocalyptic number.

It is an amenable number.

866250461 is a deficient number, since it is larger than the sum of its proper divisors (1).

866250461 is an equidigital number, since it uses as much as digits as its factorization.

866250461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 866250461 is about 29432.1331371003. The cubic root of 866250461 is about 953.2668550180.

The spelling of 866250461 in words is "eight hundred sixty-six million, two hundred fifty thousand, four hundred sixty-one".