67668906 has 16 divisors (see below), whose sum is σ = 135418464. Its totient is φ = 22542864.

The previous prime is 67668859. The next prime is 67668907. The reversal of 67668906 is 60986676.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (67668907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17785 + ... + 21251.

It is an arithmetic number, because the mean of its divisors is an integer number (8463654).

Almost surely, 2^67668906 is an apocalyptic number.

67668906 is an abundant number, since it is smaller than the sum of its proper divisors (67749558).

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

67668906 is a wasteful number, since it uses less digits than its factorization.

67668906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6725.

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 67668906 is about 8226.1112319248. Note that the first 3 decimals coincide. The cubic root of 67668906 is about 407.5019754756.

The spelling of 67668906 in words is "sixty-seven million, six hundred sixty-eight thousand, nine hundred six".