66202156212 has 24 divisors (see below), whose sum is σ = 154659414336. Its totient is φ = 22040568768.

The previous prime is 66202156169. The next prime is 66202156213. The reversal of 66202156212 is 21265120266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66202156213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3341793 + ... + 3361544.

It is an arithmetic number, because the mean of its divisors is an integer number (6444142264).

Almost surely, 2^66202156212 is an apocalyptic number.

It is an amenable number.

66202156212 is an abundant number, since it is smaller than the sum of its proper divisors (88457258124).

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

66202156212 is a wasteful number, since it uses less digits than its factorization.

66202156212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6704167 (or 6704165 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 66202156212 its reverse (21265120266), we get a palindrome (87467276478).

The spelling of 66202156212 in words is "sixty-six billion, two hundred two million, one hundred fifty-six thousand, two hundred twelve".