6740324721 has 48 divisors (see below), whose sum is σ = 10718023680. Its totient is φ = 4056635520.

The previous prime is 6740324719. The next prime is 6740324729. The reversal of 6740324721 is 1274230476.

6740324721 is a `hidden beast` number, since 6 + 7 + 403 + 247 + 2 + 1 = 666.

It is not a de Polignac number, because 6740324721 - 2¹ = 6740324719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6740324729) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1051795 + ... + 1058183.

It is an arithmetic number, because the mean of its divisors is an integer number (223292160).

Almost surely, 2^6740324721 is an apocalyptic number.

It is an amenable number.

6740324721 is a deficient number, since it is larger than the sum of its proper divisors (3977698959).

6740324721 is a wasteful number, since it uses less digits than its factorization.

6740324721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6606 (or 6603 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 6740324721 is about 82099.4806378213. The cubic root of 6740324721 is about 1888.9781736098.

The spelling of 6740324721 in words is "six billion, seven hundred forty million, three hundred twenty-four thousand, seven hundred twenty-one".