67686143969985 has 16 divisors (see below), whose sum is σ = 110816384547264. Its totient is φ = 35259758718912.

The previous prime is 67686143969863. The next prime is 67686143970017. The reversal of 67686143969985 is 58996934168676.

It is not a de Polignac number, because 67686143969985 - 2⁹ = 67686143969473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52469878402 + ... + 52469879691.

It is an arithmetic number, because the mean of its divisors is an integer number (6926024034204).

Almost surely, 2^{67686143969985} is an apocalyptic number.

It is an amenable number.

67686143969985 is a deficient number, since it is larger than the sum of its proper divisors (43130240577279).

67686143969985 is a wasteful number, since it uses less digits than its factorization.

67686143969985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104939758144.

The product of its digits is 25395793920, while the sum is 87.

The spelling of 67686143969985 in words is "sixty-seven trillion, six hundred eighty-six billion, one hundred forty-three million, nine hundred sixty-nine thousand, nine hundred eighty-five".