67116561685 has 16 divisors (see below), whose sum is σ = 85021776000. Its totient is φ = 50721512256.

The previous prime is 67116561679. The next prime is 67116561781. The reversal of 67116561685 is 58616561176.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 67116561685 - 2²¹ = 67114464533 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 979009 + ... + 1045318.

It is an arithmetic number, because the mean of its divisors is an integer number (5313861000).

Almost surely, 2^67116561685 is an apocalyptic number.

It is an amenable number.

67116561685 is a deficient number, since it is larger than the sum of its proper divisors (17905214315).

67116561685 is a wasteful number, since it uses less digits than its factorization.

67116561685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024700.

The product of its digits is 1814400, while the sum is 52.

The spelling of 67116561685 in words is "sixty-seven billion, one hundred sixteen million, five hundred sixty-one thousand, six hundred eighty-five".