66382471320 has 256 divisors, whose sum is σ = 228975206400. Its totient is φ = 15226467840.

The previous prime is 66382471319. The next prime is 66382471321. The reversal of 66382471320 is 2317428366.

It is an interprime number because it is at equal distance from previous prime (66382471319) and next prime (66382471321).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66382471321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32176609 + ... + 32178671.

It is an arithmetic number, because the mean of its divisors is an integer number (894434400).

Almost surely, 2^66382471320 is an apocalyptic number.

66382471320 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 66382471320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114487603200).

66382471320 is an abundant number, since it is smaller than the sum of its proper divisors (162592735080).

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

66382471320 is a wasteful number, since it uses less digits than its factorization.

66382471320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3390 (or 3386 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 42.

Adding to 66382471320 its reverse (2317428366), we get a palindrome (68699899686).

The spelling of 66382471320 in words is "sixty-six billion, three hundred eighty-two million, four hundred seventy-one thousand, three hundred twenty".