67939666 has 8 divisors (see below), whose sum is σ = 102712320. Its totient is φ = 33702228.

The previous prime is 67939657. The next prime is 67939681. The reversal of 67939666 is 66693976.

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

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, 133486 + ... + 133993.

It is an arithmetic number, because the mean of its divisors is an integer number (12839040).

Almost surely, 2^67939666 is an apocalyptic number.

67939666 is a deficient number, since it is larger than the sum of its proper divisors (34772654).

67939666 is a wasteful number, since it uses less digits than its factorization.

67939666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267608.

The product of its digits is 2204496, while the sum is 52.

The square root of 67939666 is about 8242.5521533079. The cubic root of 67939666 is about 408.0447575210.

The spelling of 67939666 in words is "sixty-seven million, nine hundred thirty-nine thousand, six hundred sixty-six".