1566121660212 has 48 divisors (see below), whose sum is σ = 3663262310400. Its totient is φ = 520758348000.

The previous prime is 1566121660199. The next prime is 1566121660223. The reversal of 1566121660212 is 2120661216651.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33475837 + ... + 33522587.

It is an arithmetic number, because the mean of its divisors is an integer number (76317964800).

Almost surely, 2^{1566121660212} is an apocalyptic number.

1566121660212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1566121660212 is an abundant number, since it is smaller than the sum of its proper divisors (2097140650188).

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

1566121660212 is a wasteful number, since it uses less digits than its factorization.

1566121660212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53556 (or 53554 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

Adding to 1566121660212 its reverse (2120661216651), we get a palindrome (3686782876863).

The spelling of 1566121660212 in words is "one trillion, five hundred sixty-six billion, one hundred twenty-one million, six hundred sixty thousand, two hundred twelve".