11566199986 has 16 divisors (see below), whose sum is σ = 18930412800. Its totient is φ = 5256279280.

The previous prime is 11566199977. The next prime is 11566199987. The reversal of 11566199986 is 68999166511.

It is a super-2 number, since 2×11566199986² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11566199987) 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, 60240 + ... + 163588.

It is an arithmetic number, because the mean of its divisors is an integer number (1183150800).

Almost surely, 2^11566199986 is an apocalyptic number.

11566199986 is a deficient number, since it is larger than the sum of its proper divisors (7364212814).

11566199986 is a wasteful number, since it uses less digits than its factorization.

11566199986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108449.

The product of its digits is 6298560, while the sum is 61.

The spelling of 11566199986 in words is "eleven billion, five hundred sixty-six million, one hundred ninety-nine thousand, nine hundred eighty-six".