1665500202212 has 96 divisors (see below), whose sum is σ = 3671382516480. Its totient is φ = 642193920000.

The previous prime is 1665500202181. The next prime is 1665500202229. The reversal of 1665500202212 is 2122020055661.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81150512 + ... + 81171032.

It is an arithmetic number, because the mean of its divisors is an integer number (38243567880).

Almost surely, 2^{1665500202212} 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 1665500202212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1835691258240).

1665500202212 is an abundant number, since it is smaller than the sum of its proper divisors (2005882314268).

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

1665500202212 is a wasteful number, since it uses less digits than its factorization.

1665500202212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23253 (or 23251 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 1665500202212 its reverse (2122020055661), we get a palindrome (3787520257873).

The spelling of 1665500202212 in words is "one trillion, six hundred sixty-five billion, five hundred million, two hundred two thousand, two hundred twelve".