6681287740 has 24 divisors (see below), whose sum is σ = 14056377552. Its totient is φ = 2667624960.

The previous prime is 6681287731. The next prime is 6681287747. The reversal of 6681287740 is 477821866.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681287747) 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, 294421 + ... + 316300.

It is an arithmetic number, because the mean of its divisors is an integer number (585682398).

Almost surely, 2^6681287740 is an apocalyptic number.

It is an amenable number.

6681287740 is an abundant number, since it is smaller than the sum of its proper divisors (7375089812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6681287740 is a wasteful number, since it uses less digits than its factorization.

6681287740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611277 (or 611275 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 49.

The square root of 6681287740 is about 81739.1444780284. The cubic root of 6681287740 is about 1883.4469488110.

The spelling of 6681287740 in words is "six billion, six hundred eighty-one million, two hundred eighty-seven thousand, seven hundred forty".