67872687 has 16 divisors (see below), whose sum is σ = 97395552. Its totient is φ = 41886720.

The previous prime is 67872661. The next prime is 67872691. The reversal of 67872687 is 78627876.

It is not a de Polignac number, because 67872687 - 2²² = 63678383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67872787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7798 + ... + 14019.

It is an arithmetic number, because the mean of its divisors is an integer number (6087222).

Almost surely, 2^67872687 is an apocalyptic number.

67872687 is a deficient number, since it is larger than the sum of its proper divisors (29522865).

67872687 is a wasteful number, since it uses less digits than its factorization.

67872687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21898.

The product of its digits is 1580544, while the sum is 51.

The square root of 67872687 is about 8238.4881501402. The cubic root of 67872687 is about 407.9106217617.

The spelling of 67872687 in words is "sixty-seven million, eight hundred seventy-two thousand, six hundred eighty-seven".