6747421681 has 32 divisors (see below), whose sum is σ = 9076773888. Its totient is φ = 4844024640.

The previous prime is 6747421649. The next prime is 6747421693. The reversal of 6747421681 is 1861247476.

It is not a de Polignac number, because 6747421681 - 2⁵ = 6747421649 is a prime.

It is a super-2 number, since 2×6747421681² = 91055398682457731522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6747421621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 541386 + ... + 553708.

It is an arithmetic number, because the mean of its divisors is an integer number (283649184).

Almost surely, 2^6747421681 is an apocalyptic number.

It is an amenable number.

6747421681 is a deficient number, since it is larger than the sum of its proper divisors (2329352207).

6747421681 is a wasteful number, since it uses less digits than its factorization.

6747421681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12901.

The product of its digits is 451584, while the sum is 46.

The square root of 6747421681 is about 82142.6909773475. The cubic root of 6747421681 is about 1889.6409161697.

The spelling of 6747421681 in words is "six billion, seven hundred forty-seven million, four hundred twenty-one thousand, six hundred eighty-one".