67440668 has 6 divisors (see below), whose sum is σ = 118021176. Its totient is φ = 33720332.

The previous prime is 67440643. The next prime is 67440673. The reversal of 67440668 is 86604476.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8430080 + ... + 8430087.

It is an arithmetic number, because the mean of its divisors is an integer number (19670196).

Almost surely, 2^67440668 is an apocalyptic number.

It is an amenable number.

67440668 is a deficient number, since it is larger than the sum of its proper divisors (50580508).

67440668 is a wasteful number, since it uses less digits than its factorization.

67440668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16860171 (or 16860169 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 67440668 is about 8212.2267382239. The cubic root of 67440668 is about 407.0433098693.

The spelling of 67440668 in words is "sixty-seven million, four hundred forty thousand, six hundred sixty-eight".