66544306268 has 48 divisors (see below), whose sum is σ = 130528860000. Its totient is φ = 29417230080.

The previous prime is 66544306259. The next prime is 66544306313. The reversal of 66544306268 is 86260344566.

It is a super-3 number, since 3×66544306268³ (a number of 33 digits) contains 333 as substring.

It is a congruent 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, 4467938 + ... + 4482806.

It is an arithmetic number, because the mean of its divisors is an integer number (2719351250).

Almost surely, 2^66544306268 is an apocalyptic number.

It is an amenable number.

66544306268 is a deficient number, since it is larger than the sum of its proper divisors (63984553732).

66544306268 is a wasteful number, since it uses less digits than its factorization.

66544306268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17670 (or 17668 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 50.

The spelling of 66544306268 in words is "sixty-six billion, five hundred forty-four million, three hundred six thousand, two hundred sixty-eight".