66287711296 has 21 divisors (see below), whose sum is σ = 131543764471. Its totient is φ = 33142825792.

The previous prime is 66287711291. The next prime is 66287711317. The reversal of 66287711296 is 69211778266.

The square root of 66287711296 is 257464.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66287711291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2043621 + ... + 2075803.

Almost surely, 2^66287711296 is an apocalyptic number.

66287711296 is the 257464-th square number.

It is an amenable number.

66287711296 is a deficient number, since it is larger than the sum of its proper divisors (65256053175).

66287711296 is an frugal number, since it uses more digits than its factorization.

66287711296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64378 (or 32185 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 55.

The spelling of 66287711296 in words is "sixty-six billion, two hundred eighty-seven million, seven hundred eleven thousand, two hundred ninety-six".