66343257144 has 128 divisors (see below), whose sum is σ = 194609664000. Its totient is φ = 20883163392.

The previous prime is 66343257073. The next prime is 66343257151. The reversal of 66343257144 is 44175234366.

66343257144 is a `hidden beast` number, since 6 + 6 + 3 + 4 + 32 + 571 + 44 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66343257144.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1258729 + ... + 1310375.

It is an arithmetic number, because the mean of its divisors is an integer number (1520388000).

Almost surely, 2^66343257144 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 66343257144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97304832000).

66343257144 is an abundant number, since it is smaller than the sum of its proper divisors (128266406856).

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

66343257144 is a wasteful number, since it uses less digits than its factorization.

66343257144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51994 (or 51984 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 45.

The spelling of 66343257144 in words is "sixty-six billion, three hundred forty-three million, two hundred fifty-seven thousand, one hundred forty-four".