67681136 has 10 divisors (see below), whose sum is σ = 131132232. Its totient is φ = 33840560.

The previous prime is 67681129. The next prime is 67681139. The reversal of 67681136 is 63118676.

It is a self number, because there is not a number n which added to its sum of digits gives 67681136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67681139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2115020 + ... + 2115051.

Almost surely, 2^67681136 is an apocalyptic number.

It is an amenable number.

67681136 is a deficient number, since it is larger than the sum of its proper divisors (63451096).

67681136 is a wasteful number, since it uses less digits than its factorization.

67681136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4230079 (or 4230073 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 67681136 is about 8226.8545629542. The cubic root of 67681136 is about 407.5265236728.

The spelling of 67681136 in words is "sixty-seven million, six hundred eighty-one thousand, one hundred thirty-six".