2266784581 has 2 divisors, whose sum is σ = 2266784582. Its totient is φ = 2266784580.

The previous prime is 2266784503. The next prime is 2266784587. The reversal of 2266784581 is 1854876622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2264332225 + 2452356 = 47585^2 + 1566^2 .

It is a cyclic number.

It is not a de Polignac number, because 2266784581 - 2¹⁷ = 2266653509 is a prime.

It is a super-2 number, since 2×2266784581² = 10276624673318691122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2266784587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1133392290 + 1133392291.

It is an arithmetic number, because the mean of its divisors is an integer number (1133392291).

Almost surely, 2^2266784581 is an apocalyptic number.

It is an amenable number.

2266784581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2266784581 is an equidigital number, since it uses as much as digits as its factorization.

2266784581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1290240, while the sum is 49.

The square root of 2266784581 is about 47610.7611890421. The cubic root of 2266784581 is about 1313.6210020232.

The spelling of 2266784581 in words is "two billion, two hundred sixty-six million, seven hundred eighty-four thousand, five hundred eighty-one".