1666276 has 12 divisors (see below), whose sum is σ = 2964220. Its totient is φ = 819360.

The previous prime is 1666271. The next prime is 1666279. The reversal of 1666276 is 6726661.

It can be written as a sum of positive squares in 2 ways, for example, as 389376 + 1276900 = 624^2 + 1130^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1666271) 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 3 ways as a sum of consecutive naturals, for example, 3171 + ... + 3658.

2^1666276 is an apocalyptic number.

It is an amenable number.

1666276 is a deficient number, since it is larger than the sum of its proper divisors (1297944).

1666276 is a wasteful number, since it uses less digits than its factorization.

1666276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6894 (or 6892 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 1666276 is about 1290.8431353189. The cubic root of 1666276 is about 118.5538456948.

The spelling of 1666276 in words is "one million, six hundred sixty-six thousand, two hundred seventy-six".