1566400012 has 36 divisors (see below), whose sum is σ = 2806300728. Its totient is φ = 764982400.

The previous prime is 1566400007. The next prime is 1566400013. The reversal of 1566400012 is 2100046651.

It is a self number, because there is not a number n which added to its sum of digits gives 1566400012.

It is not an unprimeable number, because it can be changed into a prime (1566400013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2641188 + ... + 2641780.

It is an arithmetic number, because the mean of its divisors is an integer number (77952798).

Almost surely, 2^1566400012 is an apocalyptic number.

It is an amenable number.

1566400012 is a deficient number, since it is larger than the sum of its proper divisors (1239900716).

1566400012 is a wasteful number, since it uses less digits than its factorization.

1566400012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1566400012 is about 39577.7716906852. The cubic root of 1566400012 is about 1161.3618597035.

Adding to 1566400012 its reverse (2100046651), we get a palindrome (3666446663).

The spelling of 1566400012 in words is "one billion, five hundred sixty-six million, four hundred thousand, twelve".