66224160440 has 64 divisors (see below), whose sum is σ = 155918165760. Its totient is φ = 25283957760.

The previous prime is 66224160439. The next prime is 66224160463. The reversal of 66224160440 is 4406142266.

It is a self number, because there is not a number n which added to its sum of digits gives 66224160440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275279 + ... + 456318.

It is an arithmetic number, because the mean of its divisors is an integer number (2436221340).

Almost surely, 2^66224160440 is an apocalyptic number.

It is an amenable number.

66224160440 is an abundant number, since it is smaller than the sum of its proper divisors (89694005320).

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

66224160440 is a wasteful number, since it uses less digits than its factorization.

66224160440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731712 (or 731708 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

The spelling of 66224160440 in words is "sixty-six billion, two hundred twenty-four million, one hundred sixty thousand, four hundred forty".