66582783432 has 224 divisors, whose sum is σ = 208952045280. Its totient is φ = 19706561280.

The previous prime is 66582783401. The next prime is 66582783439. The reversal of 66582783432 is 23438728566.

66582783432 is a `hidden beast` number, since 6 + 65 + 82 + 78 + 3 + 432 = 666.

It is a super-2 number, since 2×66582783432² (a number of 22 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (66582783439) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2746468 + ... + 2770604.

Almost surely, 2^66582783432 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 66582783432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104476022640).

66582783432 is an abundant number, since it is smaller than the sum of its proper divisors (142369261848).

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

66582783432 is a wasteful number, since it uses less digits than its factorization.

66582783432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24215 (or 24196 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 54.

The spelling of 66582783432 in words is "sixty-six billion, five hundred eighty-two million, seven hundred eighty-three thousand, four hundred thirty-two".