6710456821 has 2 divisors, whose sum is σ = 6710456822. Its totient is φ = 6710456820.

The previous prime is 6710456813. The next prime is 6710456887. The reversal of 6710456821 is 1286540176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3584416900 + 3126039921 = 59870^2 + 55911^2 .

It is a cyclic number.

It is not a de Polignac number, because 6710456821 - 2³ = 6710456813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6710456521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3355228410 + 3355228411.

It is an arithmetic number, because the mean of its divisors is an integer number (3355228411).

Almost surely, 2^6710456821 is an apocalyptic number.

It is an amenable number.

6710456821 is a deficient number, since it is larger than the sum of its proper divisors (1).

6710456821 is an equidigital number, since it uses as much as digits as its factorization.

6710456821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 6710456821 is about 81917.3780159009. The cubic root of 6710456821 is about 1886.1838792891.

Adding to 6710456821 its reverse (1286540176), we get a palindrome (7996996997).

The spelling of 6710456821 in words is "six billion, seven hundred ten million, four hundred fifty-six thousand, eight hundred twenty-one".