67689644 has 48 divisors (see below), whose sum is σ = 135910656. Its totient is φ = 29198400.

The previous prime is 67689641. The next prime is 67689653. The reversal of 67689644 is 44698676.

It is a junction number, because it is equal to n+sod(n) for n = 67689592 and 67689601.

It is not an unprimeable number, because it can be changed into a prime (67689641) 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 15 ways as a sum of consecutive naturals, for example, 213374 + ... + 213690.

It is an arithmetic number, because the mean of its divisors is an integer number (2831472).

Almost surely, 2^67689644 is an apocalyptic number.

It is an amenable number.

67689644 is an abundant number, since it is smaller than the sum of its proper divisors (68221012).

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

67689644 is a wasteful number, since it uses less digits than its factorization.

67689644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566 (or 564 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 50.

The square root of 67689644 is about 8227.3716337601. The cubic root of 67689644 is about 407.5435992845.

The spelling of 67689644 in words is "sixty-seven million, six hundred eighty-nine thousand, six hundred forty-four".