6720731487 has 8 divisors (see below), whose sum is σ = 9956639280. Its totient is φ = 4480487640.

The previous prime is 6720731449. The next prime is 6720731543. The reversal of 6720731487 is 7841370276.

It is not a de Polignac number, because 6720731487 - 2⁸ = 6720731231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6720731417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124457964 + ... + 124458017.

It is an arithmetic number, because the mean of its divisors is an integer number (1244579910).

Almost surely, 2^6720731487 is an apocalyptic number.

6720731487 is a deficient number, since it is larger than the sum of its proper divisors (3235907793).

6720731487 is a wasteful number, since it uses less digits than its factorization.

6720731487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248915990 (or 248915984 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The square root of 6720731487 is about 81980.0676201234. The cubic root of 6720731487 is about 1887.1460605117.

The spelling of 6720731487 in words is "six billion, seven hundred twenty million, seven hundred thirty-one thousand, four hundred eighty-seven".