66205043600620 has 48 divisors (see below), whose sum is σ = 146533948565760. Its totient is φ = 25056348629184.

The previous prime is 66205043600593. The next prime is 66205043600623. The reversal of 66205043600620 is 2600634050266.

It is not an unprimeable number, because it can be changed into a prime (66205043600623) 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, 110389504 + ... + 110987623.

It is an arithmetic number, because the mean of its divisors is an integer number (3052790595120).

Almost surely, 2^{66205043600620} is an apocalyptic number.

It is an amenable number.

66205043600620 is an abundant number, since it is smaller than the sum of its proper divisors (80328904965140).

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

66205043600620 is a wasteful number, since it uses less digits than its factorization.

66205043600620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221377942 (or 221377940 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 40.

Adding to 66205043600620 its reverse (2600634050266), we get a palindrome (68805677650886).

The spelling of 66205043600620 in words is "sixty-six trillion, two hundred five billion, forty-three million, six hundred thousand, six hundred twenty".