66765040580 has 48 divisors (see below), whose sum is σ = 160262758656. Its totient is φ = 22887062400.

The previous prime is 66765040561. The next prime is 66765040583. The reversal of 66765040580 is 8504056766.

66765040580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66765040583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880742 + ... + 953538.

It is an arithmetic number, because the mean of its divisors is an integer number (3338807472).

Almost surely, 2^66765040580 is an apocalyptic number.

It is an amenable number.

66765040580 is an abundant number, since it is smaller than the sum of its proper divisors (93497718076).

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

66765040580 is a wasteful number, since it uses less digits than its factorization.

66765040580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79364 (or 79362 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 47.

The spelling of 66765040580 in words is "sixty-six billion, seven hundred sixty-five million, forty thousand, five hundred eighty".