66224477528 has 64 divisors (see below), whose sum is σ = 139199800320. Its totient is φ = 29271715200.

The previous prime is 66224477509. The next prime is 66224477593. The reversal of 66224477528 is 82577442266.

It is a self number, because there is not a number n which added to its sum of digits gives 66224477528.

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, 6972863 + ... + 6982353.

It is an arithmetic number, because the mean of its divisors is an integer number (2174996880).

Almost surely, 2^66224477528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66224477528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69599900160).

66224477528 is an abundant number, since it is smaller than the sum of its proper divisors (72975322792).

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

66224477528 is a wasteful number, since it uses less digits than its factorization.

66224477528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11688 (or 11684 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 53.

The spelling of 66224477528 in words is "sixty-six billion, two hundred twenty-four million, four hundred seventy-seven thousand, five hundred twenty-eight".