66007716 has 12 divisors (see below), whose sum is σ = 154018032. Its totient is φ = 22002568.

The previous prime is 66007681. The next prime is 66007727. The reversal of 66007716 is 61770066.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2750310 + ... + 2750333.

It is an arithmetic number, because the mean of its divisors is an integer number (12834836).

Almost surely, 2^66007716 is an apocalyptic number.

It is an amenable number.

66007716 is an abundant number, since it is smaller than the sum of its proper divisors (88010316).

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

66007716 is a wasteful number, since it uses less digits than its factorization.

66007716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5500650 (or 5500648 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 66007716 is about 8124.5132777293. The cubic root of 66007716 is about 404.1397500384.

The spelling of 66007716 in words is "sixty-six million, seven thousand, seven hundred sixteen".