1197666 has 20 divisors (see below), whose sum is σ = 2684022. Its totient is φ = 399168.

The previous prime is 1197649. The next prime is 1197697. The reversal of 1197666 is 6667911.

It can be written as a sum of positive squares in only one way, i.e., 1147041 + 50625 = 1071^2 + 225^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1197666.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3535 + ... + 3858.

2^1197666 is an apocalyptic number.

1197666 is an abundant number, since it is smaller than the sum of its proper divisors (1486356).

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

1197666 is an equidigital number, since it uses as much as digits as its factorization.

1197666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7407 (or 7398 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 1197666 is about 1094.3792761196. The cubic root of 1197666 is about 106.1969165053.

The spelling of 1197666 in words is "one million, one hundred ninety-seven thousand, six hundred sixty-six".