66044402420 has 48 divisors (see below), whose sum is σ = 146031997440. Its totient is φ = 25020648576.

The previous prime is 66044402357. The next prime is 66044402509. The reversal of 66044402420 is 2420444066.

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 15 ways as a sum of consecutive naturals, for example, 1534109 + ... + 1576571.

It is an arithmetic number, because the mean of its divisors is an integer number (3042333280).

Almost surely, 2^66044402420 is an apocalyptic number.

It is an amenable number.

66044402420 is an abundant number, since it is smaller than the sum of its proper divisors (79987595020).

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

66044402420 is a wasteful number, since it uses less digits than its factorization.

66044402420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46584 (or 46582 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 66044402420 its reverse (2420444066), we get a palindrome (68464846486).

The spelling of 66044402420 in words is "sixty-six billion, forty-four million, four hundred two thousand, four hundred twenty".