6721030205 has 12 divisors (see below), whose sum is σ = 8289115380. Its totient is φ = 5231499264.

The previous prime is 6721030171. The next prime is 6721030229. The reversal of 6721030205 is 5020301276.

It can be written as a sum of positive squares in 6 ways, for example, as 2576374564 + 4144655641 = 50758^2 + 64379^2 .

It is not a de Polignac number, because 6721030205 - 2⁸ = 6721029949 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 484100 + ... + 497789.

It is an arithmetic number, because the mean of its divisors is an integer number (690759615).

Almost surely, 2^6721030205 is an apocalyptic number.

It is an amenable number.

6721030205 is a deficient number, since it is larger than the sum of its proper divisors (1568085175).

6721030205 is an equidigital number, since it uses as much as digits as its factorization.

6721030205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981968 (or 981931 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 6721030205 is about 81981.8894939608. The cubic root of 6721030205 is about 1887.1740195787.

The spelling of 6721030205 in words is "six billion, seven hundred twenty-one million, thirty thousand, two hundred five".