66404810444 has 24 divisors (see below), whose sum is σ = 132883957920. Its totient is φ = 28443275136.

The previous prime is 66404810441. The next prime is 66404810447. The reversal of 66404810444 is 44401840466.

It is an interprime number because it is at equal distance from previous prime (66404810441) and next prime (66404810447).

It is not an unprimeable number, because it can be changed into a prime (66404810441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 612737 + ... + 712920.

It is an arithmetic number, because the mean of its divisors is an integer number (5536831580).

Almost surely, 2^66404810444 is an apocalyptic number.

It is an amenable number.

66404810444 is an abundant number, since it is smaller than the sum of its proper divisors (66479147476).

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

66404810444 is a wasteful number, since it uses less digits than its factorization.

66404810444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327457 (or 1327455 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 41.

The spelling of 66404810444 in words is "sixty-six billion, four hundred four million, eight hundred ten thousand, four hundred forty-four".