66000444 has 24 divisors (see below), whose sum is σ = 155038800. Its totient is φ = 21851904.

The previous prime is 66000421. The next prime is 66000469. The reversal of 66000444 is 44400066.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16669 + ... + 20244.

It is an arithmetic number, because the mean of its divisors is an integer number (6459950).

Almost surely, 2^66000444 is an apocalyptic number.

It is an amenable number.

66000444 is an abundant number, since it is smaller than the sum of its proper divisors (89038356).

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

66000444 is a wasteful number, since it uses less digits than its factorization.

66000444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37069 (or 37067 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 66000444 is about 8124.0657309010. The cubic root of 66000444 is about 404.1249082776.

The spelling of 66000444 in words is "sixty-six million, four hundred forty-four", and thus it is an aban number.