11671866 has 12 divisors (see below), whose sum is σ = 25289082. Its totient is φ = 3890616.

The previous prime is 11671861. The next prime is 11671889. The reversal of 11671866 is 66817611.

It can be written as a sum of positive squares in only one way, i.e., 11594025 + 77841 = 3405^2 + 279^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11671866.

It is not an unprimeable number, because it can be changed into a prime (11671861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 324201 + ... + 324236.

Almost surely, 2^11671866 is an apocalyptic number.

11671866 is an abundant number, since it is smaller than the sum of its proper divisors (13617216).

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

11671866 is a wasteful number, since it uses less digits than its factorization.

11671866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648445 (or 648442 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 11671866 is about 3416.4112750077. The cubic root of 11671866 is about 226.8367576641.

The spelling of 11671866 in words is "eleven million, six hundred seventy-one thousand, eight hundred sixty-six".