1666274 has 8 divisors (see below), whose sum is σ = 2510508. Its totient is φ = 829440.

The previous prime is 1666271. The next prime is 1666279. The reversal of 1666274 is 4726661.

It can be written as a sum of positive squares in 2 ways, for example, as 1600225 + 66049 = 1265^2 + 257^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1666274.

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, 1247 + ... + 2210.

2^1666274 is an apocalyptic number.

1666274 is a deficient number, since it is larger than the sum of its proper divisors (844234).

1666274 is a wasteful number, since it uses less digits than its factorization.

1666274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3700.

The product of its digits is 12096, while the sum is 32.

The square root of 1666274 is about 1290.8423606312. The cubic root of 1666274 is about 118.5537982621.

The spelling of 1666274 in words is "one million, six hundred sixty-six thousand, two hundred seventy-four".