67686689 has 12 divisors (see below), whose sum is σ = 78876144. Its totient is φ = 57915144.

The previous prime is 67686659. The next prime is 67686701. The reversal of 67686689 is 98668676.

It is not a de Polignac number, because 67686689 - 2²⁴ = 50909473 is a prime.

It is a super-3 number, since 3×67686689³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67686649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43682 + ... + 45204.

It is an arithmetic number, because the mean of its divisors is an integer number (6573012).

Almost surely, 2^67686689 is an apocalyptic number.

It is an amenable number.

67686689 is a deficient number, since it is larger than the sum of its proper divisors (11189455).

67686689 is a wasteful number, since it uses less digits than its factorization.

67686689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444 (or 2437 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 56.

The square root of 67686689 is about 8227.1920483237. The cubic root of 67686689 is about 407.5376687424.

The spelling of 67686689 in words is "sixty-seven million, six hundred eighty-six thousand, six hundred eighty-nine".