11320420566 has 64 divisors (see below), whose sum is σ = 27880731648. Its totient is φ = 2983989888.

The previous prime is 11320420549. The next prime is 11320420583. The reversal of 11320420566 is 66502402311.

It is an interprime number because it is at equal distance from previous prime (11320420549) and next prime (11320420583).

It is a super-2 number, since 2×11320420566² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1269375 + ... + 1278261.

It is an arithmetic number, because the mean of its divisors is an integer number (435636432).

Almost surely, 2^11320420566 is an apocalyptic number.

11320420566 is an abundant number, since it is smaller than the sum of its proper divisors (16560311082).

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

11320420566 is a wasteful number, since it uses less digits than its factorization.

11320420566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11245.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 11320420566 its reverse (66502402311), we get a palindrome (77822822877).

The spelling of 11320420566 in words is "eleven billion, three hundred twenty million, four hundred twenty thousand, five hundred sixty-six".