2680665817 has 2 divisors, whose sum is σ = 2680665818. Its totient is φ = 2680665816.

The previous prime is 2680665769. The next prime is 2680665851. The reversal of 2680665817 is 7185660862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1735472281 + 945193536 = 41659^2 + 30744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2680665817 is a prime.

It is not a weakly prime, because it can be changed into another prime (2680665017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340332908 + 1340332909.

It is an arithmetic number, because the mean of its divisors is an integer number (1340332909).

Almost surely, 2^2680665817 is an apocalyptic number.

It is an amenable number.

2680665817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2680665817 is an equidigital number, since it uses as much as digits as its factorization.

2680665817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 2680665817 is about 51775.1467115256. The cubic root of 2680665817 is about 1389.1449318988.

The spelling of 2680665817 in words is "two billion, six hundred eighty million, six hundred sixty-five thousand, eight hundred seventeen".