11566663316 has 24 divisors (see below), whose sum is σ = 21813575784. Its totient is φ = 5334819840.

The previous prime is 11566663309. The next prime is 11566663327. The reversal of 11566663316 is 61336666511.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1811716 + 11564851600 = 1346^2 + 107540^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1916 + ... + 152108.

It is an arithmetic number, because the mean of its divisors is an integer number (908898991).

Almost surely, 2^11566663316 is an apocalyptic number.

It is an amenable number.

11566663316 is a deficient number, since it is larger than the sum of its proper divisors (10246912468).

11566663316 is a wasteful number, since it uses less digits than its factorization.

11566663316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151691 (or 151689 counting only the distinct ones).

The product of its digits is 349920, while the sum is 44.

The spelling of 11566663316 in words is "eleven billion, five hundred sixty-six million, six hundred sixty-three thousand, three hundred sixteen".