66459221248 has 72 divisors (see below), whose sum is σ = 154836041472. Its totient is φ = 27876476928.

The previous prime is 66459221237. The next prime is 66459221299. The reversal of 66459221248 is 84212295466.

66459221248 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66459221248² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310315 + ... + 478762.

It is an arithmetic number, because the mean of its divisors is an integer number (2150500576).

Almost surely, 2^66459221248 is an apocalyptic number.

It is an amenable number.

66459221248 is an abundant number, since it is smaller than the sum of its proper divisors (88376820224).

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

66459221248 is an equidigital number, since it uses as much as digits as its factorization.

66459221248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789147 (or 789133 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 49.

The spelling of 66459221248 in words is "sixty-six billion, four hundred fifty-nine million, two hundred twenty-one thousand, two hundred forty-eight".