1188666 has 12 divisors (see below), whose sum is σ = 2575482. Its totient is φ = 396216.

The previous prime is 1188661. The next prime is 1188667. The reversal of 1188666 is 6668811.

It can be written as a sum of positive squares in only one way, i.e., 772641 + 416025 = 879^2 + 645^2 .

It is a plaindrome in base 16.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1188666.

It is not an unprimeable number, because it can be changed into a prime (1188661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33001 + ... + 33036.

2^1188666 is an apocalyptic number.

1188666 is an abundant number, since it is smaller than the sum of its proper divisors (1386816).

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

1188666 is a wasteful number, since it uses less digits than its factorization.

1188666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66045 (or 66042 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 1188666 is about 1090.2596021132. The cubic root of 1188666 is about 105.9302377093.

The spelling of 1188666 in words is "one million, one hundred eighty-eight thousand, six hundred sixty-six".