66380843452 has 72 divisors (see below), whose sum is σ = 146063294048. Its totient is φ = 25838714880.

The previous prime is 66380843443. The next prime is 66380843497. The reversal of 66380843452 is 25434808366.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66380843396 and 66380843405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3897868 + ... + 3914860.

Almost surely, 2^66380843452 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 66380843452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73031647024).

66380843452 is an abundant number, since it is smaller than the sum of its proper divisors (79682450596).

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

66380843452 is a wasteful number, since it uses less digits than its factorization.

66380843452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18179 (or 18166 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 49.

The spelling of 66380843452 in words is "sixty-six billion, three hundred eighty million, eight hundred forty-three thousand, four hundred fifty-two".