1005220566 has 48 divisors (see below), whose sum is σ = 2597347584. Its totient is φ = 274717872.

The previous prime is 1005220561. The next prime is 1005220577. The reversal of 1005220566 is 6650225001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005220561) 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 23 ways as a sum of consecutive naturals, for example, 170536 + ... + 176331.

It is an arithmetic number, because the mean of its divisors is an integer number (54111408).

Almost surely, 2^1005220566 is an apocalyptic number.

1005220566 is an abundant number, since it is smaller than the sum of its proper divisors (1592127018).

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

1005220566 is a wasteful number, since it uses less digits than its factorization.

1005220566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346905 (or 346902 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1005220566 is about 31705.2135460400. The cubic root of 1005220566 is about 1001.7371691625.

Adding to 1005220566 its reverse (6650225001), we get a palindrome (7655445567).

The spelling of 1005220566 in words is "one billion, five million, two hundred twenty thousand, five hundred sixty-six".