66446650312 has 24 divisors (see below), whose sum is σ = 144928281510. Its totient is φ = 28477135680.

The previous prime is 66446650307. The next prime is 66446650321. The reversal of 66446650312 is 21305664466.

It can be written as a sum of positive squares in only one way, i.e., 63004012036 + 3442638276 = 251006^2 + 58674^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84752989 + ... + 84753772.

Almost surely, 2^66446650312 is an apocalyptic number.

It is an amenable number.

66446650312 is an abundant number, since it is smaller than the sum of its proper divisors (78481631198).

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

66446650312 is a wasteful number, since it uses less digits than its factorization.

66446650312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169506781 (or 169506770 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 66446650312 in words is "sixty-six billion, four hundred forty-six million, six hundred fifty thousand, three hundred twelve".