6722761905 has 12 divisors (see below), whose sum is σ = 11652787380. Its totient is φ = 3585472992.

The previous prime is 6722761901. The next prime is 6722761907. The reversal of 6722761905 is 5091672276.

6722761905 is a `hidden beast` number, since 6 + 7 + 2 + 27 + 619 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2045843361 + 4676918544 = 45231^2 + 68388^2 .

It is not a de Polignac number, because 6722761905 - 2² = 6722761901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 149394709 = 6722761905 / (6 + 7 + 2 + 2 + 7 + 6 + 1 + 9 + 0 + 5).

It is not an unprimeable number, because it can be changed into a prime (6722761901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74697310 + ... + 74697399.

It is an arithmetic number, because the mean of its divisors is an integer number (971065615).

Almost surely, 2^6722761905 is an apocalyptic number.

It is an amenable number.

6722761905 is a deficient number, since it is larger than the sum of its proper divisors (4930025475).

6722761905 is a wasteful number, since it uses less digits than its factorization.

6722761905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149394720 (or 149394717 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 6722761905 is about 81992.4502926946. The cubic root of 6722761905 is about 1887.3360849426.

The spelling of 6722761905 in words is "six billion, seven hundred twenty-two million, seven hundred sixty-one thousand, nine hundred five".