2666833681 has 2 divisors, whose sum is σ = 2666833682. Its totient is φ = 2666833680.

The previous prime is 2666833669. The next prime is 2666833691. The reversal of 2666833681 is 1863386662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2479143681 + 187690000 = 49791^2 + 13700^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666833681 - 2¹⁷ = 2666702609 is a prime.

It is a super-2 number, since 2×2666833681² = 14224003764232019522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2666833691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333416840 + 1333416841.

It is an arithmetic number, because the mean of its divisors is an integer number (1333416841).

Almost surely, 2^2666833681 is an apocalyptic number.

It is an amenable number.

2666833681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666833681 is an equidigital number, since it uses as much as digits as its factorization.

2666833681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 49.

The square root of 2666833681 is about 51641.3950334419. The cubic root of 2666833681 is about 1386.7514984146.

The spelling of 2666833681 in words is "two billion, six hundred sixty-six million, eight hundred thirty-three thousand, six hundred eighty-one".