67606580681 has 4 divisors (see below), whose sum is σ = 68615634192. Its totient is φ = 66597527172.

The previous prime is 67606580651. The next prime is 67606580707. The reversal of 67606580681 is 18608560676.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67606580681 - 2¹⁸ = 67606318537 is a prime.

It is a super-2 number, since 2×67606580681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67606580641) 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, 504526655 + ... + 504526788.

It is an arithmetic number, because the mean of its divisors is an integer number (17153908548).

Almost surely, 2^67606580681 is an apocalyptic number.

It is an amenable number.

67606580681 is a deficient number, since it is larger than the sum of its proper divisors (1009053511).

67606580681 is a wasteful number, since it uses less digits than its factorization.

67606580681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009053510.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 67606580681 in words is "sixty-seven billion, six hundred six million, five hundred eighty thousand, six hundred eighty-one".