66040822480 has 80 divisors (see below), whose sum is σ = 156134631744. Its totient is φ = 25973821440.

The previous prime is 66040822451. The next prime is 66040822481. The reversal of 66040822480 is 8422804066.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×66040822480² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66040822481) by changing a digit.

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, 1377472 + ... + 1424608.

Almost surely, 2^66040822480 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 66040822480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78067315872).

66040822480 is an abundant number, since it is smaller than the sum of its proper divisors (90093809264).

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

66040822480 is a wasteful number, since it uses less digits than its factorization.

66040822480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47444 (or 47438 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 66040822480 in words is "sixty-six billion, forty million, eight hundred twenty-two thousand, four hundred eighty".