11566656674 has 8 divisors (see below), whose sum is σ = 17356187628. Its totient is φ = 5781260800.

The previous prime is 11566656649. The next prime is 11566656677. The reversal of 11566656674 is 47665666511.

It can be written as a sum of positive squares in 2 ways, for example, as 11561625625 + 5031049 = 107525^2 + 2243^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×11566656674² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11566656677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1026767 + ... + 1037970.

Almost surely, 2^11566656674 is an apocalyptic number.

11566656674 is a deficient number, since it is larger than the sum of its proper divisors (5789530954).

11566656674 is a wasteful number, since it uses less digits than its factorization.

11566656674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067540.

The product of its digits is 5443200, while the sum is 53.

The spelling of 11566656674 in words is "eleven billion, five hundred sixty-six million, six hundred fifty-six thousand, six hundred seventy-four".