66512334312 has 48 divisors (see below), whose sum is σ = 183536404740. Its totient is φ = 21752460288.

The previous prime is 66512334281. The next prime is 66512334313. The reversal of 66512334312 is 21343321566.

66512334312 is a `hidden beast` number, since 6 + 6 + 5 + 1 + 2 + 334 + 312 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 66468058596 + 44275716 = 257814^2 + 6654^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (66512334313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8711113 + ... + 8718744.

Almost surely, 2^66512334312 is an apocalyptic number.

It is an amenable number.

66512334312 is an abundant number, since it is smaller than the sum of its proper divisors (117024070428).

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

66512334312 is a wasteful number, since it uses less digits than its factorization.

66512334312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17429922 (or 17429915 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

Adding to 66512334312 its reverse (21343321566), we get a palindrome (87855655878).

The spelling of 66512334312 in words is "sixty-six billion, five hundred twelve million, three hundred thirty-four thousand, three hundred twelve".