1320500566 has 16 divisors (see below), whose sum is σ = 2469507840. Its totient is φ = 514480680.

The previous prime is 1320500561. The next prime is 1320500581. The reversal of 1320500566 is 6650050231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320500561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4287186 + ... + 4287493.

It is an arithmetic number, because the mean of its divisors is an integer number (154344240).

Almost surely, 2^1320500566 is an apocalyptic number.

1320500566 is a deficient number, since it is larger than the sum of its proper divisors (1149007274).

1320500566 is a wasteful number, since it uses less digits than its factorization.

1320500566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8574699.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 1320500566 is about 36338.6924090562. The cubic root of 1320500566 is about 1097.0999549664.

Adding to 1320500566 its reverse (6650050231), we get a palindrome (7970550797).

The spelling of 1320500566 in words is "one billion, three hundred twenty million, five hundred thousand, five hundred sixty-six".