66380797252 has 72 divisors (see below), whose sum is σ = 148937328288. Its totient is φ = 25595942400.

The previous prime is 66380797199. The next prime is 66380797267. The reversal of 66380797252 is 25279708366.

66380797252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66380797252² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66380797193 and 66380797202.

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, 50427 + ... + 367837.

It is an arithmetic number, because the mean of its divisors is an integer number (2068574004).

Almost surely, 2^66380797252 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 66380797252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74468664144).

66380797252 is an abundant number, since it is smaller than the sum of its proper divisors (82556531036).

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

66380797252 is a wasteful number, since it uses less digits than its factorization.

66380797252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317537 (or 317528 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 66380797252 in words is "sixty-six billion, three hundred eighty million, seven hundred ninety-seven thousand, two hundred fifty-two".