1668371 has 8 divisors (see below), whose sum is σ = 1768080. Its totient is φ = 1569888.

The previous prime is 1668361. The next prime is 1668379. The reversal of 1668371 is 1738661.

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

It is a cyclic number.

It is not a de Polignac number, because 1668371 - 2⁶ = 1668307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668379) 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 7 ways as a sum of consecutive naturals, for example, 5105 + ... + 5421.

It is an arithmetic number, because the mean of its divisors is an integer number (221010).

2^1668371 is an apocalyptic number.

1668371 is a deficient number, since it is larger than the sum of its proper divisors (99709).

1668371 is a wasteful number, since it uses less digits than its factorization.

1668371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613.

The product of its digits is 6048, while the sum is 32.

The square root of 1668371 is about 1291.6543655328. The cubic root of 1668371 is about 118.6035105938.

It can be divided in two parts, 1668 and 371, that multiplied together give a triangular number (618828 = T₁₁₁₂).

The spelling of 1668371 in words is "one million, six hundred sixty-eight thousand, three hundred seventy-one".