6705480721 has 2 divisors, whose sum is σ = 6705480722. Its totient is φ = 6705480720.

The previous prime is 6705480713. The next prime is 6705480781. The reversal of 6705480721 is 1270845076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6599287696 + 106193025 = 81236^2 + 10305^2 .

It is a cyclic number.

It is not a de Polignac number, because 6705480721 - 2³ = 6705480713 is a prime.

It is not a weakly prime, because it can be changed into another prime (6705480701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3352740360 + 3352740361.

It is an arithmetic number, because the mean of its divisors is an integer number (3352740361).

Almost surely, 2^6705480721 is an apocalyptic number.

It is an amenable number.

6705480721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6705480721 is an equidigital number, since it uses as much as digits as its factorization.

6705480721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 6705480721 is about 81886.9997069132. Note that the first 3 decimals coincide. The cubic root of 6705480721 is about 1885.7175344578.

The spelling of 6705480721 in words is "six billion, seven hundred five million, four hundred eighty thousand, seven hundred twenty-one".