6861766213 has 2 divisors, whose sum is σ = 6861766214. Its totient is φ = 6861766212.

The previous prime is 6861766199. The next prime is 6861766243. The reversal of 6861766213 is 3126671686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6726788289 + 134977924 = 82017^2 + 11618^2 .

It is a cyclic number.

It is not a de Polignac number, because 6861766213 - 2²⁹ = 6324895301 is a prime.

It is a super-2 number, since 2×6861766213² = 94167671123736722738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6861766243) 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, 3430883106 + 3430883107.

It is an arithmetic number, because the mean of its divisors is an integer number (3430883107).

Almost surely, 2^6861766213 is an apocalyptic number.

It is an amenable number.

6861766213 is a deficient number, since it is larger than the sum of its proper divisors (1).

6861766213 is an equidigital number, since it uses as much as digits as its factorization.

6861766213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The square root of 6861766213 is about 82835.7785802729. The cubic root of 6861766213 is about 1900.2553870005.

The spelling of 6861766213 in words is "six billion, eight hundred sixty-one million, seven hundred sixty-six thousand, two hundred thirteen".