67704103781 has 4 divisors (see below), whose sum is σ = 67770416364. Its totient is φ = 67637791200.

The previous prime is 67704103699. The next prime is 67704103787. The reversal of 67704103781 is 18730140776.

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 56532670756 + 11171433025 = 237766^2 + 105695^2 .

It is a cyclic number.

It is not a de Polignac number, because 67704103781 - 2¹⁴ = 67704087397 is a prime.

It is a super-2 number, since 2×67704103781² (a number of 22 digits) 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 (67704103787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33154760 + ... + 33156801.

It is an arithmetic number, because the mean of its divisors is an integer number (16942604091).

Almost surely, 2^67704103781 is an apocalyptic number.

It is an amenable number.

67704103781 is a deficient number, since it is larger than the sum of its proper divisors (66312583).

67704103781 is a wasteful number, since it uses less digits than its factorization.

67704103781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66312582.

The product of its (nonzero) digits is 197568, while the sum is 44.

The spelling of 67704103781 in words is "sixty-seven billion, seven hundred four million, one hundred three thousand, seven hundred eighty-one".