43544020066 has 8 divisors (see below), whose sum is σ = 65318725584. Its totient is φ = 21771111540.

The previous prime is 43544020061. The next prime is 43544020067. The reversal of 43544020066 is 66002044534.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (43544020061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386940 + ... + 486631.

It is an arithmetic number, because the mean of its divisors is an integer number (8164840698).

Almost surely, 2^43544020066 is an apocalyptic number.

43544020066 is a deficient number, since it is larger than the sum of its proper divisors (21774705518).

43544020066 is a wasteful number, since it uses less digits than its factorization.

43544020066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898496.

The product of its (nonzero) digits is 69120, while the sum is 34.

The spelling of 43544020066 in words is "forty-three billion, five hundred forty-four million, twenty thousand, sixty-six".