6874065781 has 12 divisors (see below), whose sum is σ = 7740084492. Its totient is φ = 6096728000.

The previous prime is 6874065733. The next prime is 6874065791. The reversal of 6874065781 is 1875604786.

It can be written as a sum of positive squares in 2 ways, for example, as 214036900 + 6660028881 = 14630^2 + 81609^2 .

It is not a de Polignac number, because 6874065781 - 2¹¹ = 6874063733 is a prime.

It is a super-2 number, since 2×6874065781² = 94505560723030279922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6874065701) 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, 687850 + ... + 697771.

It is an arithmetic number, because the mean of its divisors is an integer number (645007041).

Almost surely, 2^6874065781 is an apocalyptic number.

It is an amenable number.

6874065781 is a deficient number, since it is larger than the sum of its proper divisors (866018711).

6874065781 is a wasteful number, since it uses less digits than its factorization.

6874065781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385684 (or 1385673 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 52.

The square root of 6874065781 is about 82909.9860149548. The cubic root of 6874065781 is about 1901.3900982260.

The spelling of 6874065781 in words is "six billion, eight hundred seventy-four million, sixty-five thousand, seven hundred eighty-one".