1566806520140 has 48 divisors (see below), whose sum is σ = 3667200415200. Its totient is φ = 558811487232.

The previous prime is 1566806520127. The next prime is 1566806520151. The reversal of 1566806520140 is 410256086651.

It is a junction number, because it is equal to n+sod(n) for n = 1566806520091 and 1566806520100.

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, 121263395 + ... + 121276314.

It is an arithmetic number, because the mean of its divisors is an integer number (76400008650).

Almost surely, 2^{1566806520140} is an apocalyptic number.

1566806520140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1566806520140 is an abundant number, since it is smaller than the sum of its proper divisors (2100393895060).

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

1566806520140 is a wasteful number, since it uses less digits than its factorization.

1566806520140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242539754 (or 242539752 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 1566806520140 in words is "one trillion, five hundred sixty-six billion, eight hundred six million, five hundred twenty thousand, one hundred forty".