67803007321681 has 4 divisors (see below), whose sum is σ = 71791419517092. Its totient is φ = 63814595126272.

The previous prime is 67803007321667. The next prime is 67803007321697. The reversal of 67803007321681 is 18612370030876.

67803007321681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50095819065600 + 17707188256081 = 7077840^2 + 4207991^2 .

It is a cyclic number.

It is not a de Polignac number, because 67803007321681 - 2¹¹ = 67803007319633 is a prime.

It is a super-2 number, since 2×67803007321681² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67803007321381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1994206097680 + ... + 1994206097713.

It is an arithmetic number, because the mean of its divisors is an integer number (17947854879273).

Almost surely, 2^{67803007321681} is an apocalyptic number.

It is an amenable number.

67803007321681 is a deficient number, since it is larger than the sum of its proper divisors (3988412195411).

67803007321681 is a wasteful number, since it uses less digits than its factorization.

67803007321681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988412195410.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 67803007321681 in words is "sixty-seven trillion, eight hundred three billion, seven million, three hundred twenty-one thousand, six hundred eighty-one".