66714442812 has 144 divisors (see below), whose sum is σ = 181745272800. Its totient is φ = 20591800320.

The previous prime is 66714442777. The next prime is 66714442819. The reversal of 66714442812 is 21824441766.

66714442812 is a `hidden beast` number, since 66 + 71 + 4 + 442 + 81 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66714442819) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2512228 + ... + 2538644.

It is an arithmetic number, because the mean of its divisors is an integer number (1262119950).

Almost surely, 2^66714442812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66714442812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90872636400).

66714442812 is an abundant number, since it is smaller than the sum of its proper divisors (115030829988).

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

66714442812 is a wasteful number, since it uses less digits than its factorization.

66714442812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26556 (or 26551 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The spelling of 66714442812 in words is "sixty-six billion, seven hundred fourteen million, four hundred forty-two thousand, eight hundred twelve".