66566422759224 has 128 divisors (see below), whose sum is σ = 176036491296000. Its totient is φ = 20917607961600.

The previous prime is 66566422759211. The next prime is 66566422759229. The reversal of 66566422759224 is 42295722466566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66566422759229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 564632764 + ... + 564750644.

It is an arithmetic number, because the mean of its divisors is an integer number (1375285088250).

Almost surely, 2^{66566422759224} 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 66566422759224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88018245648000).

66566422759224 is an abundant number, since it is smaller than the sum of its proper divisors (109470068536776).

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

66566422759224 is a wasteful number, since it uses less digits than its factorization.

66566422759224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123989 (or 123985 counting only the distinct ones).

The product of its digits is 522547200, while the sum is 66.

The spelling of 66566422759224 in words is "sixty-six trillion, five hundred sixty-six billion, four hundred twenty-two million, seven hundred fifty-nine thousand, two hundred twenty-four".