11001320566 has 16 divisors (see below), whose sum is σ = 16669915488. Its totient is φ = 5444712000.

The previous prime is 11001320563. The next prime is 11001320581. The reversal of 11001320566 is 66502310011.

It is a self number, because there is not a number n which added to its sum of digits gives 11001320566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001320563) 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, 1319551 + ... + 1327861.

It is an arithmetic number, because the mean of its divisors is an integer number (1041869718).

Almost surely, 2^11001320566 is an apocalyptic number.

11001320566 is a deficient number, since it is larger than the sum of its proper divisors (5668594922).

11001320566 is a wasteful number, since it uses less digits than its factorization.

11001320566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14967.

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 11001320566 its reverse (66502310011), we get a palindrome (77503630577).

The spelling of 11001320566 in words is "eleven billion, one million, three hundred twenty thousand, five hundred sixty-six".