66004544 has 28 divisors (see below), whose sum is σ = 133770624. Its totient is φ = 32298624.

The previous prime is 66004541. The next prime is 66004607. The reversal of 66004544 is 44540066.

66004544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66004541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7964 + ... + 13979.

Almost surely, 2^66004544 is an apocalyptic number.

66004544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66004544 is an abundant number, since it is smaller than the sum of its proper divisors (67766080).

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

66004544 is a wasteful number, since it uses less digits than its factorization.

66004544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22002 (or 21992 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 66004544 is about 8124.3180636900. The cubic root of 66004544 is about 404.1332762911.

The spelling of 66004544 in words is "sixty-six million, four thousand, five hundred forty-four".