3268667681 has 2 divisors, whose sum is σ = 3268667682. Its totient is φ = 3268667680.

The previous prime is 3268667671. The next prime is 3268667729. The reversal of 3268667681 is 1867668623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2849851456 + 418816225 = 53384^2 + 20465^2 .

It is a cyclic number.

It is not a de Polignac number, because 3268667681 - 2⁶ = 3268667617 is a prime.

It is a super-2 number, since 2×3268667681² = 21368376817627835522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3268667671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1634333840 + 1634333841.

It is an arithmetic number, because the mean of its divisors is an integer number (1634333841).

Almost surely, 2^3268667681 is an apocalyptic number.

It is an amenable number.

3268667681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3268667681 is an equidigital number, since it uses as much as digits as its factorization.

3268667681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 53.

The square root of 3268667681 is about 57172.2632139047. The cubic root of 3268667681 is about 1484.0786692444.

The spelling of 3268667681 in words is "three billion, two hundred sixty-eight million, six hundred sixty-seven thousand, six hundred eighty-one".