66330906 has 32 divisors (see below), whose sum is σ = 141118848. Its totient is φ = 20712960.

The previous prime is 66330857. The next prime is 66330947. The reversal of 66330906 is 60903366.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22371 + ... + 25161.

It is an arithmetic number, because the mean of its divisors is an integer number (4409964).

Almost surely, 2^66330906 is an apocalyptic number.

66330906 is an abundant number, since it is smaller than the sum of its proper divisors (74787942).

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

66330906 is a wasteful number, since it uses less digits than its factorization.

66330906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046.

The product of its (nonzero) digits is 17496, while the sum is 33.

The square root of 66330906 is about 8144.3787976739. The cubic root of 66330906 is about 404.7982656336.

The spelling of 66330906 in words is "sixty-six million, three hundred thirty thousand, nine hundred six".