67680087 has 4 divisors (see below), whose sum is σ = 90240120. Its totient is φ = 45120056.

The previous prime is 67680061. The next prime is 67680091. The reversal of 67680087 is 78008676.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67680087 - 2⁶ = 67680023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67680097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11280012 + ... + 11280017.

It is an arithmetic number, because the mean of its divisors is an integer number (22560030).

Almost surely, 2^67680087 is an apocalyptic number.

67680087 is a deficient number, since it is larger than the sum of its proper divisors (22560033).

67680087 is a wasteful number, since it uses less digits than its factorization.

67680087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22560032.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 67680087 is about 8226.7908080855. The cubic root of 67680087 is about 407.5244182239.

The spelling of 67680087 in words is "sixty-seven million, six hundred eighty thousand, eighty-seven".