66088384380 has 384 divisors, whose sum is σ = 220658457600. Its totient is φ = 16577809920.

The previous prime is 66088384363. The next prime is 66088384381. The reversal of 66088384380 is 8348388066.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66088384381) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 233527719 + ... + 233528001.

It is an arithmetic number, because the mean of its divisors is an integer number (574631400).

Almost surely, 2^66088384380 is an apocalyptic number.

66088384380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66088384380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110329228800).

66088384380 is an abundant number, since it is smaller than the sum of its proper divisors (154570073220).

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

66088384380 is a wasteful number, since it uses less digits than its factorization.

66088384380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613 (or 593 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 54.

The spelling of 66088384380 in words is "sixty-six billion, eighty-eight million, three hundred eighty-four thousand, three hundred eighty".