67664906 has 16 divisors (see below), whose sum is σ = 102757248. Its totient is φ = 33415200.

The previous prime is 67664881. The next prime is 67664939. The reversal of 67664906 is 60946676.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70526 + ... + 71478.

It is an arithmetic number, because the mean of its divisors is an integer number (6422328).

Almost surely, 2^67664906 is an apocalyptic number.

67664906 is a deficient number, since it is larger than the sum of its proper divisors (35092342).

67664906 is a wasteful number, since it uses less digits than its factorization.

67664906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 67664906 is about 8225.8681000852. The cubic root of 67664906 is about 407.4939459876.

The spelling of 67664906 in words is "sixty-seven million, six hundred sixty-four thousand, nine hundred six".