66066906 has 8 divisors (see below), whose sum is σ = 132133824. Its totient is φ = 22022300.

The previous prime is 66066899. The next prime is 66066953. The reversal of 66066906 is 60966066.

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

66066906 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5505570 + ... + 5505581.

It is an arithmetic number, because the mean of its divisors is an integer number (16516728).

Almost surely, 2^66066906 is an apocalyptic number.

66066906 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.

66066906 is a wasteful number, since it uses less digits than its factorization.

66066906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11011156.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 66066906 is about 8128.1551412359. The cubic root of 66066906 is about 404.2605131184.

The spelling of 66066906 in words is "sixty-six million, sixty-six thousand, nine hundred six".