1675666 has 4 divisors (see below), whose sum is σ = 2513502. Its totient is φ = 837832.

The previous prime is 1675637. The next prime is 1675679. The reversal of 1675666 is 6665761.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6665761 = 59 ⋅112979.

It can be written as a sum of positive squares in only one way, i.e., 1404225 + 271441 = 1185^2 + 521^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 418915 + ... + 418918.

2^1675666 is an apocalyptic number.

1675666 is a deficient number, since it is larger than the sum of its proper divisors (837836).

1675666 is an equidigital number, since it uses as much as digits as its factorization.

1675666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837835.

The product of its digits is 45360, while the sum is 37.

The square root of 1675666 is about 1294.4751832306. The cubic root of 1675666 is about 118.7761250000.

The spelling of 1675666 in words is "one million, six hundred seventy-five thousand, six hundred sixty-six".