67689684 has 36 divisors (see below), whose sum is σ = 171370836. Its totient is φ = 22528128.

The previous prime is 67689653. The next prime is 67689689. The reversal of 67689684 is 48698676.

It can be written as a sum of positive squares in 2 ways, for example, as 21068100 + 46621584 = 4590^2 + 6828^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 67689684.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67689689) 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 in 11 ways as a sum of consecutive naturals, for example, 33322 + ... + 35294.

It is an arithmetic number, because the mean of its divisors is an integer number (4760301).

Almost surely, 2^67689684 is an apocalyptic number.

It is an amenable number.

67689684 is an abundant number, since it is smaller than the sum of its proper divisors (103681152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67689684 is a wasteful number, since it uses less digits than its factorization.

67689684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936 (or 2931 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 67689684 is about 8227.3740646697. The cubic root of 67689684 is about 407.5436795614.

The spelling of 67689684 in words is "sixty-seven million, six hundred eighty-nine thousand, six hundred eighty-four".