67938666 has 8 divisors (see below), whose sum is σ = 135877344. Its totient is φ = 22646220.

The previous prime is 67938659. The next prime is 67938679. The reversal of 67938666 is 66683976.

It is a sphenic number, since it is the product of 3 distinct primes.

67938666 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5661550 + ... + 5661561.

It is an arithmetic number, because the mean of its divisors is an integer number (16984668).

Almost surely, 2^67938666 is an apocalyptic number.

67938666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

67938666 is a wasteful number, since it uses less digits than its factorization.

67938666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11323116.

The product of its digits is 1959552, while the sum is 51.

The square root of 67938666 is about 8242.4914922613. The cubic root of 67938666 is about 408.0427555155.

The spelling of 67938666 in words is "sixty-seven million, nine hundred thirty-eight thousand, six hundred sixty-six".