66247216312 has 8 divisors (see below), whose sum is σ = 124213530600. Its totient is φ = 33123608152.

The previous prime is 66247216303. The next prime is 66247216363. The reversal of 66247216312 is 21361274266.

66247216312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4140451012 + ... + 4140451027.

It is an arithmetic number, because the mean of its divisors is an integer number (15526691325).

Almost surely, 2^66247216312 is an apocalyptic number.

It is an amenable number.

66247216312 is a deficient number, since it is larger than the sum of its proper divisors (57966314288).

66247216312 is a wasteful number, since it uses less digits than its factorization.

66247216312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8280902045 (or 8280902041 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The spelling of 66247216312 in words is "sixty-six billion, two hundred forty-seven million, two hundred sixteen thousand, three hundred twelve".