67666040 has 32 divisors (see below), whose sum is σ = 163961280. Its totient is φ = 24984192.

The previous prime is 67666033. The next prime is 67666057. The reversal of 67666040 is 4066676.

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 in 7 ways as a sum of consecutive naturals, for example, 64544 + ... + 65583.

It is an arithmetic number, because the mean of its divisors is an integer number (5123790).

Almost surely, 2^67666040 is an apocalyptic number.

It is an amenable number.

67666040 is an abundant number, since it is smaller than the sum of its proper divisors (96295240).

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

67666040 is a wasteful number, since it uses less digits than its factorization.

67666040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130151 (or 130147 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 67666040 is about 8225.9370286916. The cubic root of 67666040 is about 407.4962223796.

The spelling of 67666040 in words is "sixty-seven million, six hundred sixty-six thousand, forty".