66443344 has 80 divisors (see below), whose sum is σ = 151865280. Its totient is φ = 27822080.

The previous prime is 66443341. The next prime is 66443357. The reversal of 66443344 is 44334466.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66443341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158367 + ... + 158785.

It is an arithmetic number, because the mean of its divisors is an integer number (1898316).

Almost surely, 2^66443344 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 66443344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75932640).

66443344 is an abundant number, since it is smaller than the sum of its proper divisors (85421936).

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

66443344 is a wasteful number, since it uses less digits than its factorization.

66443344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 502 counting only the distinct ones).

The product of its digits is 82944, while the sum is 34.

The square root of 66443344 is about 8151.2786726991. The cubic root of 66443344 is about 405.0268620094.

The spelling of 66443344 in words is "sixty-six million, four hundred forty-three thousand, three hundred forty-four".