1566277412 has 48 divisors (see below), whose sum is σ = 3198424320. Its totient is φ = 657201792.

The previous prime is 1566277403. The next prime is 1566277417. The reversal of 1566277412 is 2147726651.

It is a self number, because there is not a number n which added to its sum of digits gives 1566277412.

It is not an unprimeable number, because it can be changed into a prime (1566277417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1003889 + ... + 1005447.

It is an arithmetic number, because the mean of its divisors is an integer number (66633840).

Almost surely, 2^1566277412 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 1566277412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1599212160).

1566277412 is an abundant number, since it is smaller than the sum of its proper divisors (1632146908).

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

1566277412 is a wasteful number, since it uses less digits than its factorization.

1566277412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300 (or 2298 counting only the distinct ones).

The product of its digits is 141120, while the sum is 41.

The square root of 1566277412 is about 39576.2228111779. Note that the first 3 decimals coincide. The cubic root of 1566277412 is about 1161.3315595082.

The spelling of 1566277412 in words is "one billion, five hundred sixty-six million, two hundred seventy-seven thousand, four hundred twelve".